"Batra, S. W. T., Schroeder, D., Boldt, P. E. & Mendl, W. 1986. Insects associated with purple loosestrife (Lythrum salicaria L.) in Europe. Proceedings of the Entomological Society of Washington, 88(4): 748-759." . "1986"^^ . . . "Batra et al. (1986)" . "Batra et al. (1986)" . . "1986"^^ . . .