H. . Singh, P. . Bose, A. P. . Singh, and A. P. . Singh, “Formulation And Evaluation of Betulinic Acid Loaded Transdermal Patches”, J. Drug Delivery Ther., vol. 15, no. 1, pp. 52–58, Jan. 2025, doi: 10.22270/jddt.v15i1.6951.