S. Jibril, 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”, J. Sci. Math. Lett., vol. 8, no. 2, pp. 1–7, Mar. 2020, doi: 10.37134/jsml.vol8.2.1.2020.