?COMPARATIVE STUDIES OF BIOGENIC AMINES AND THEIR METABOLITES IN PERIPLANETA AMERICANA BY GAS CHROMATOGRAPHY/NEGATIVE ION CHEMICAL IONISATION-MASS SPECTROMETRY (GC.NICI-MS). Pakistan Journal of Scientific & Industrial Research. 1995;38(5-6):172-178. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2467