Jyoti Verma , Dr. Prakash Deep , Dr. Himani Awasthi , Tran., “Quantitative estimation of ursolic acid by HPTLC in methanolic extract of leaves Streblus asper and Melissa officinalis”, CDF, vol. 54, no. 4, pp. 973–980, Feb. 2025, doi: 10.48047/p2zqgm38.