Karunaratne, S.H.P.P.2012-04-042012-04-041999Ceylon Journal of Science (Biological Sciences)27pp.9-18https://dl.nsf.gov.lk/handle/1/7624Biological SciencesCockroachesPeriplaneta AmericanaPeriplaneta AustralasiaInsecticide resistancePossible mechanism of insecticide tolerance in the cockroaches, Periplaneta Americana(L.) and P.Australasia (F.)Article