Changes in midgut endopeptidase activity of spodoptera frugiperda (Lepidoptera: noctuidae) is responsible for adaptation to soybean proteinase inhibitors - Paulillo, L. C. M. S.; Lopes, A R; Cristofoletti, P T; Parra, José Roberto Postali; Terra, Walter Ribeiro; Silva Filho, Márcio de Castro (Encontro Científico dos Pós-Graduandos no CENA/USP, 2000)