Mukherjee, Jayanti, et al. “Stability-Indicating RP-HPLC Method for Determination of Ursodeoxycholic Acid in Tablet Dosage Form”. Asian Journal of Chemistry, vol. 23, no. 9, June 2011, pp. 4189-92, https://asianpubs.org/index.php/ajchem/article/view/10846.