Trinovita, E., 		Valencia, R., 		Shinta, H., 		Toemon, A., & 		Ysrafil, Y.
2025 Apr 30.  Evaluation of combination patch of vetel leaf extract (Piper sp.) - ultrasonic assisted extraction (UAE) as a transdermal delivery system on fibroblast cell formation and collagen density. JURNAL ILMU KEFARMASIAN INDONESIA. [Online] 23:1