E. Y. Sukandar, A. Ridwan, and Y. P. Sukmawan, “VASODILATATION EFFECT OF ETHANOLIC EXTRACT OF ANREDERA CORDIFOLIA, SONCHUS ARVENSIS L, AND URSOLIC ACID ON ISOLATED RABBIT AORTIC AND FROG HEART”, Int J Pharm Pharm Sci, vol. 8, no. 2, pp. 145–149, Feb. 2016.