D. O. Moronkola, T. P. Oladapo, F. O. Adegbenro, O. O. Ogunbanjo, and K. O. Olayinka, “The Chemical constituents in essential oils of Pterocarpus soyauxii leaf, leaf stalk and stem bark”, J. Drug Delivery Ther., vol. 9, no. 2, pp. 206–211, Mar. 2019, doi: 10.22270/jddt.v9i2.2493.