⦁    Amahia, G. N. (2007): Probability II. Publishers: Distance Learning Centre, U. I. ISBN 978-021-271- X.  Eds. Egbokhare F., Adeyemo, O. I. and Akinsanya, O. O. (86 pages).

⦁     Amahia, G. N. (1996): Research Methods and Survey Methodology for Macroeconomic Policy Analysis and Planning in: Macroeconomic     Policy Analysis: Tools, Techniques and Applications to Nigeria. Eds. Obadan, M. I., Iyoha, M. A. Chapter 7, pp 159-176. ISBN 978-    2785-28-8.

⦁    Amahia, G. N. (2008): Making Statistical Inferences in: Methodology of Basic and Applied Research, Eds. Olayinka, A. I., Popoola, L. and Ojebode, A. Chapter 15, pp 145-152.

⦁    Amahia, G. N., Adegbite, D. A., Beckley, B. G., Ogunleye, S. A., Phillips, S. And Vaughan (2012):Manual for the Collection of Agricultural and Socio-economic Data in Nigeria.  ISBN 978-978-50091-1-8

⦁      Mokhopadyay, P. & Amahia, G. N. (1986): On the Robustness of Some Sampling Strategies. India Society of Probability & Statistics, VIII Conference Proceedings, pp 65-77.

⦁     Amahia, G. N. (1986): Robust Sampling Strategies under Polynomial Regression Models. First Scientific   Conference of the African Statistical Association, pp 404- 411.

⦁     Amahia, G. N. (2004): A Modified Horvitz-Thompson Estimator under the Midzuno Sampling Scheme.  Paper presented at the International Conference for Mathematical & Computer Sciences, Lagos.

⦁    Amahia, G. N. Chaubey, Y. P. and Rao, T. J. (1989):Efficiency of a New Estimator in PPS Sampling for Multiple Characteristics. Journal of  Statistical Planning & Inference, Vol. 21, pp 75-84.
⦁     Amahia, G. N. (1999): On the Relative Efficiency of a New Estimator in PPS Sampling for Multiple   Characteristics. Journal of the         Nigerian Statistical Association, Vol. 6(1), pp 8-16.

⦁    Mukhopadhyay, P. & Amahia, G. N. (1994): Robustness of some Sampling Strategies under Polynomial Regression Models. Metron 51, pp 177-185.

⦁     Amahia, G. N. (1998): The Robustness of some Sampling Strategies. Journal of the Nigerian Statistician 1, pp 64-72.

⦁     Amahia, G. N. (2000): Alternative Estimator in PPS Sampling for Multiple Characteristics. Journal of Science Research, Vol.(6) 2, pp 93-96.

⦁    Amahia, G. N. (2001): A Modified Horvitz- Thompson Estimator Under the Midzuno Sampling Scheme. Journal of Science Research, Vol.    7(1), pp 1-3.

⦁    Amahia, G. N. (2004): Some Sampling Strategies in Unequal Probability Sampling for Multiple Characteristics. Publications of the International Centre for Mathematics and Computer Sciences, Lagos.Vol. 1, pp 215-222.

⦁    Alawode, O. A. and Amahia, G. N. (2007): Training Schedules for Sixteen Ayo Players using some Balanced Incomplete Block Designs. Science Focus. Vol. 13(2), pp 56-69.

⦁    Olayiwola, O. M., Adewara, A. A., Amahia, G. N. and Salawu, O.O. (2008): Longitudinal Survey Response in Some Communities in the South Western Region of Nigeria. International Journal of Pure and Applied Sciences, Vol.1 (3), pp 80-88.

⦁    Olayiwola, O. M., Amahia, G. N., Adepoju, A. A. and Salawu, O. O. (2009): Longitudinal Survey Participation Patterns in the South-        Western Region of Nigeria.   International Journal of Social Science, Vol.1(2), 88-94.

⦁    Akomolafe, A. A and Amahia, G. N. (2009): Customer- Behaviour Transaction Data Analysis. International Journal of Management, Vol.1(1), pp 32-37.
⦁    Ajiboye, A. S. and Amahia, G. N. (2009): A Coefficient of Variation Approach to the Portfolio Optimization Problem. Science Focus. Vol.14(3), pp 330-336.

⦁    Alawode, O. A., Amahia, G. N. and Eludire, A. A. (2010): On the construction of Balanced Incomplete Block Designs Using Lotto     Designs. Journal of Modern Mathematics and Statistics, Vol. 4(1), pp 50-52.

⦁    Olatayo, T. O., Amahia, G. N. and Obilade, T. O. (2010): Bootstrap Method for Dependent Data Structure and Measure of Statistical Precision. Journal of Mathematics and Statistics 6(2), pp 84-88.

⦁    Dontwi I. K., Amahia G. N., Chukwu A. U., Udomboso C. G. (2010): Factors Affecting Learning in an Open and Distance Learning Programme.  International Journal of Distance Education.  Vol. 5, pp 60-76, ISSN: 0795 – 0065.

⦁    Olayiwola, O. M., Amahia, G. N. and Adewara, A. A. (2011):
On patterns of refusals conversion and propensity of converted refusals to respond at later waves in a Longitudinal Survey. Canadian Journal of Mathematical Research 3(1), pp 121-124.

⦁    Dontwi, I. K., Amahia, G. N., Chukwu, A. U. and Udomboso, C. G. (2010): Factors affecting Learning in an open and Distance Learning Programme. International Journal of Distance Education. Vol.5, pp 60-76.

⦁    Eze, S. O., Amahia, G. N., Olayiwola, O. M. And Adewara, A. A. (2011): Efficiency of Second Occasion over First Occasion On Successive Sampling for Regression Estimation. Canadian Journal of Mathematics Research 3(2), pp 235-242.

⦁    Ajiboye, A. S. and Amahia, G. N. (2010): The Variance and the Coefficient of Variation Criteria in Portfolio Optimization. Global Journal of Finance and Management. 3(2), pp 253-260.

⦁     Amahia, G. N. (2010): Factors, Preventions and Correction Methods for Non-response in Sample Surveys.  Central Bank of Nigeria Journal of Applied Statistics 1(1), pp79-89.
⦁    Udomboso, C. G. and Amahia, G. N. (2011) Comparative Analysis of Rainfall Prediction Using Statistical Neural Network and Classical Linear Regression Model. Journal of Modern Mathematics and Statistics 5(3), pp 66-70.

⦁    Olayiwola, O. M., Amahia, G. N., Adewara, A. A. and Chukwu, A.U. (2011) Application of Response surface methodology for capturing optimum response in a longitudinal survey. International Journal of Applied Science and Technology 1(5), pp 171-176.

⦁    Olayiwola, O. M., Adewara, A. A., Amahia, G. N. and Okunlade, A. A. (2011) on the effect of daily average reading and sleeping hours on student’s Cumulative Grade Point Average (CGPA). Elixer Statistics 34, pp 2371-2374

⦁    Olayiwola, O. M., Amahia, G. N. and Adewara, A. A. (2011) Survey responses across various levels of response predictors in some selected communities in Oyo town, Oyo State, Nigeria. Elixer Statistics 36, pp 3241-3244.

⦁    Ikughur, A. J. and Amahia, G. N. (2011) A Generalized linear transformation for selection probabilities in unequal probability sampling scheme. Journal of Scientific and Industrial Studies. 9 (1), pp 58-63.

⦁     Ikughur, A. J. and Amahia, G. N. (2011) On the direction of relationship: Implication to finite population estimation. Journal of Research in Physical Sciences 7(1), pp  84-87.

⦁    Ikughur, A. J. And Amahia, G. N. (2012) A Class of Alternative Linear Estimators in Probabilities Proportional to Size Sampling Scheme. International Journal of Statistics and Analysis 2(4), ISSN 2248-9959, pp 429 – 436.

⦁    Ekaette, I. E. And Amahia, G. N. (2012) A Class of Alternative Estimators in Probability Proportional to Size Sampling With Replacement for Multiple Characteristics. Journal of Mathematics Research 4(3), ISSN 1916-9795, pp 66 – 77.
⦁    Oyegunle, O. A., Amahia, G. N., Olayiwola, O. M., and Adewara, A. A. (2012): Application of Factorial Design and Response Surface and Methodology on Growth Rate of Broiler Chickens served with Fluted Pumpkin Leaves Extract. Elixer Statistics 43, 6839-6842, ISSN: 2229-712X.
⦁    Akomolafe, A. A and Amahia, G. N. (2010): Capturing Customer Evolving Buying Behaviour in Consumer Packaged Goods Data. Journal of Management. Vol. (1), 32-37.

⦁     Akomolafe, A. A. and Amahia, G. N. (2011): Factor Analysis of Consumers’ Buying Behaviour: A case study of a durable good. International Journal of Management. Vol, 2(8) 58-73.

⦁    Akomolafe, A. A., Amahia, G. N., Ayoola, F. J. and Olubowale, K. O. (2010): Stochastic and Habitual Nature of Mobile Service Consumption in Nigeria. African Journal of Sustainable Development. Vol. 3(1) 1-8.

⦁    Ikughur, A, J, and Amahia, G. N. (2013): Specification Parameters for Linear Estimators in Probability Proportional to Size Sampling Scheme. African Journal of Mathematics and Computer Science Research.Vol. 6(4) 58-63 ISSN 2006-9731, http//www.academicjournals.org/AJMCSR.

⦁    Chukwu, Angela U., Yakubu, Y., Bamiduro, T. A., and Amahia, G. N. (2013): Robustness of Split-plot Central Composite Designs in the Presence of a Single Missing Observation.  The Pacific Journal of Science and Technology.  Vol. 14, Number 2, 194-211.

⦁    Abayomi A. Akomolafe and G.N. Amahia (2015): Efficiency of Discriminant Analysis in Identifying Performance of Students at Risk in Nigerian Private Universities. The Pacific Journal of Science and Technology. Volume 16.Number 1. May 2015 (Spring).

⦁    Ewemooje, O. S. and G. N. Amahia (2015): Improved Randomized Response Technique for Two Sensitive Attributes. Afrika Statistika, Vol. 10(2), 839-852. D01: ⦁    http://dx.doi.org/10.16929|as|2015.639.78