M. Ibrahim, M. M. Idris, U. Dauda, U. Ali, and A. Muhammad, “Isolation and Characterization of Friedelin and 5-DodecylResorcinol from the Stem Bark Extract of Pterocarpus erinaceus”, J. Sci. Math. Lett., vol. 10, no. 2, pp. 74–80, Oct. 2022, doi: 10.37134/jsml.vol10.2.9.2022.