“?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, vol. 38, no. 5-6, pp. 172–178, Jun. 1995, Accessed: Mar. 10, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2467