Ladonni, H., Aoulhasani, M., Shaeghi, M. (1998). 'Susceptibility of first nymphal stage of different strains of Blatella germanica L.( Dictyoptera : Blatellidae ) to Diazinon and Propoxur, using insecticide impregnated papers', Journal of Entomological Society of Iran, 17(1,2), pp. 31-39.