Jibril, Saidu, Hasnah Mohd Sirat, Maikudi Musa Idris, Aminu Mohammad, and Kamal Ja’afar Muhammad. 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):1-7. https://doi.org/10.37134/jsml.vol8.2.1.2020.