Damle, Mrinalini C., et al. “Evaluation of Hepatoprotective Activity of Hydroalcoholic Extract of Onion Peels Containing Protocatechuic Acid”. Journal of Drug Delivery and Therapeutics, vol. 9, no. 4, July 2019, pp. 82-88, https://doi.org/10.22270/jddt.v9i4.2982.