Erondu, E.S. and E.C. Nduka, 1993. Computation of water quality index (WQI) for beneficial uses: Studies on water samples from the New Calabar River. Nig. J. Biotech., 11: 63-68.

Akpan, S.S. and E.C. Nduka, 2008. A quadratic programming model for selection of fertilizer combination for crop optimal yield using the concept of response surface methodology. J. Engr. Appl. Sci. Pak., 3: 569-573.
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Akpan, S.S., E.C. Nduka and M.E. Udo, 2008. On modified lemke algorithm for solving quadratic programming problems. Ultra Sci., 20: 557-566.

Akpan, S.S., M.E. Udoh and E.C. Nduka, 2010. A combinatorial search technique for constructing optimal designs for biased models. J. Maths. Res., 2: 125-129.
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Chukwu, W.I.E. and E.C. Nduka, 1993. Optimal search method in multi-commodity flow problem. Discovery Innovation Afr. Acad. Sci. Kenya, 5: 265-268.

Didia, B.C., E.C. Nduka and O. Adele, 2009. Stature estimation formulae for Nigerians. J. Forensic. Sci., 54 : 20-21.
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Ebong, D.W. and E.C. Nduka, 2005. Calculus With Applications: An Introduction. 2nd Edn., Footsteps, Port Harcourt, Nigeria.

Erondu, E.S. and E.C. Nduka, 1993. A model for determining water quality index for classification of the New Calabar River at aluu port Harcourt, Nigeria. Int. J. Env. Stud., 44: 131-134.
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Etuk, U.H. and E.C. Nduka, 1993. A stochastic model for manpower development in an organization: A series queue approach. Int. J. Math Ed. Sci. Tech., 24: 177-181.
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Igabari, J.N. and E.C. Nduka, 2011. On some sampling formulas for the two-type galton-watson processes with application to mitochondria DNA. Nig. J. Sci. Env., 10: 180-184.

Ijomah, M.A. and E.C. Nduka, 2008. Impact of HIV/AIDS on Nigeria`s economic growth: The Granger causality approach. J. Ultra Scitst. Phy. Sci. India, 20: 227-236.

John, O.O. and E.C. Nduka, 2009. Quantile regression analysis as a robust alternative to ordinary least squares. Sci. Afr., 8: 61-65.
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Nduka, E.C. and I.E. Kalu, 2001. Strategies for cost-effective disposal of solid Wastes in Nigeria. J. Agric. Sci. Envit. Mgt., 5: 5-8.

Nduka, E.C. and I.E. Kalu, 2002. Economic analysis of wastes management in Nigeria. J. Agric. Sci. Envit. Mgt., 6: 64-68.

Nduka, E.C. and J.N. Igabari, 2007. A modified generalized generating function. Global J. Math. Sci., 6: 93-95.

Nduka, E.C. and T.A. Bamiduro, 1997. A new generalized inverse polynomial for response surface designs. J. Nig. Stat. Assoc., 11: 41-48.

Nduka, E.C. and T.A. Bamiduro, 2002. Obtaining proportion of optimum yield when full yield is unattainable. Global J. Math. Sci., 1: 21-25.
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Nduka, E.C., 1999. Principles of Applied Statistics 1. Regression And Correlation Analyses. Crystal Publishers, Okigwe Nigeria. ISBN.878-34710-6-6.

Nduka, E.C., 1991. Students degree project as an efficient test discriminator. Int. J. Maths. Ed. Sci. Tech., 22: 395-401.
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Nduka, E.C., 1992. A note on the inversion theorem. Int. J. Math. Ed. Sci. Tech., 23: 314-316.

Nduka, E.C., 1995. Testing the goodness of approximation of the mitscherlich model via its variants. Int. J. Math. Ed. Sci. Tech., 26: 213-217.
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Nduka, E.C., 1997. Methods for discriminating between models. Int. J. Math Ed. Sci. Tech., 28: 317-320.

Nduka, E.C., 1999. Model comparisons in plant-yield relationships. Global. J. Pure Appl. Sci., 5: 417-419.

Nduka, E.C., 2008. Statistics: Concepts and Methods. 3rd Edn., Crystal Publishers, Okigwe Nigeria.

Nduka, E.C., O. Owolabi and J.D. Olisa, 2004. Basic Mathematics. 2nd Edn., Abe Publishers, Port Harcourt, Nigeria.

Nduka, E.C., T.A. Bamiduro and J.T. Atobatele, 1998. Obtaining proportion of optimum yield under an inverse polynomial yield-density relationship. J. Sci. Res., 4: 1-2.

Nwobi, F.N. and E.C. Nduka, 2003. Statistical Notes and Tables for Research. 2nd Edn., Alphabet Nigeria, Owerri, Nigeria.

Ogolime, O.J. and E.C. Nduka, 2003. An alternative method of assessing students scores in several courses. Physi. Sci., 2: 1-5.

Onuoha, G.C. and E.C. Nduka, 2004. Application of water quality indices for the classification of the Bonny River-Nigeria. Sci. Afr., 3: 23-32.

Onuoha, G.C. and E.C. Nduka, 2002. A generalized exponential model for determining water quality index (WQI) for the classification of the bonny River, Nigeria. J. Agric. Biotech. Environ., 4: 1-7.

Onuoha, G.C., A. Adoki, E.S. Erondu and E.C. Nduka, 1994. Microbial profile of organically enriched freshwater ponds in South Eastern Nigeria. Int. J Env Stud., 48: 275-282.
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Owate, I.O. and E.C. Nduka, 2001. Essentials of Research Methods and Technical Writing. Minson Publishers, Port Harcourt, Nigeria.

Williams, E.E., S.S. Akpan, T.A. Ugbe and E.C. Nduka, 2010. Construction of optimal odd fractional designs in mixed series experiment using semi latin square. J. Maths. Res., 2: 19-22.
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