1. Kumar, A. and A.K. Agrawal, 2017. Existence of Hopf-bifurcation in a 6-dimensional system. Commun. Applied Anal., 21: 119-126.
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2. Kumar, A., A.K. Agrawal, A. Hasan and A.K. Misra, 2016. Modeling the effect of toxicant on the deformity in a subclass of a biological species. Model. Earth Syst. Environ., Vol. 2. 10.1007/s40808-016-0086-x.
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3. Agrawal, A.K. and A. Kumar, 2016. A bifurcation study: Effect of a toxicant on a biological species, emitted by itself in its own environment. Int. J. Sci. Eng., 2: 13-24.
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4. Agarwal, A.K., A.W. Khan and A.K. Agrawal, 2016. The effect of an external toxicant on a biological species in case of deformity: A model. Model. Earth Syst. Environ., Vol. 2. 10.1007/s40808-016-0203-x.
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5. Agarwal, A.K., A.W. Khan and A.K. Agrawal, 2016. A model for the adverse effect of two toxicants causing deformity in a subclass of a biological species. Int. J. Pure Applied Math., 110: 447-462.
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6. Kumar, A., A.W. Khan and A.K. Agrawal, 2015. Modeling the simultaneous effect of two toxicants causing deformity in a subclass of biological population. IOSR-JM., 11: 70-82.
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7. Kumar, A., A.K. Agrawal, S.N. Mishra and P. Tripathi, 2015. Existence of Hopf-bifurcation in a 5-dimensional system. Int. J. Med. Res., 3: 33-38.