Jibril, S., Sirat, H. M., Idris, M. M., Mohammad, A., & 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), 1–7. https://doi.org/10.37134/jsml.vol8.2.1.2020