Maharani, Endang Tri Wahyuni, et al. “In Vitro Inhibition Capacity in Ca Oxalate Formation by Lemon (Citrus Lemon) Juice”. Journal of Natural Sciences and Mathematics Research, vol. 1, no. 2, Dec. 2015, pp. 41-45, https://journal.walisongo.ac.id/index.php/JNSMR/article/view/1638.