Jibril, S., Sirat, H. M., Idris, M. M., Mohammad, A. and Muhammad, K. J. (2020) “Ultrasonic Assisted Extraction and Gas Chromatography-Tandem Mass Spectroscopy (GC-MS/MS) Analysis of Extracts from Four Cassia Species”, Journal of Science and Mathematics Letters, 8(2), pp. 1–7. doi: 10.37134/jsml.vol8.2.1.2020.