''Piperonyl Butoxide,<ref>{{ен}} Tozzi, A. A Brief ''History of the Development of Piperonyl Butoxide as an Insecticide Synergist''. In Piperonyl Butoxide: The Insecticide Synergist; Jones, D. G., Ed.; Academic: San Diego, CA, (1998). стр. 1.-5.[http://npic.orst.edu/factsheets/pbogen.pdf ''What is piperonyl butoxide?''] {{ен}}</ref>''