M. MUHARNI, F. FERLINAHAYATI, H. YOHANDINI, F. RIYANTI, and N. A. P. PAKPAHAN, “The THE ANTICHOLESTEROL ACTIVITY OF BETULINIC ACID AND STIGMASTEROL ISOLATED FROM THE LEAVES OF SUNGKAI (PARONEMA CANESCENS JACK)”, Int J App Pharm, vol. 13, no. 2, pp. 198–203, Mar. 2021.