V. Singh, S. S. Srivastava, and P. B. Singh, “Effect of Cypermethrin on Conjugation of Sex Steroid Hormones during Reproductively Active and Reproductively Inactive Phases of the Annual Reproductive Cycle in <I>Heteropneustes fossilis</I> (Bloch)”, JEOH, vol. 11, no. 1-2, pp. 91–99, Jun. 2011.