Mala, M., Islam, M. M. U. and Islam, K. S. (2012) “Residual effect of two insecticides and neem oil against epilachna beetle, Epilachna vigintioctopunctata (Fab.) on bitter gourd”, Journal of the Bangladesh Agricultural University, 10(1), pp. 21–25. doi: 10.3329/jbau.v10i1.12034.