Jibril, S., H. M. Sirat, M. M. Idris, A. Mohammad, and K. J. Muhammad. “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, vol. 8, no. 2, Mar. 2020, pp. 1-7, doi:10.37134/jsml.vol8.2.1.2020.