D, D. D., S. I, and A. A. Soemardji. “Two Synergetic Effects of Sonchus Arvensis L. Leaves Decoction in Calcium Oxalate Bladder Stone Therapy on Male Wistar Rat”. International Journal of Research in Phytochemistry and Pharmacology, Vol. 2, no. 3, June 2012, pp. 147-9, https://scienztech.org/index.php/ijrpp/article/view/824.