Muhammedoglu, B., and H. Kerem Tolan. “Comparing One-Stage and Two-Stage Treatment Approach of Cholelithiasis and Choledocholithiasis”. Annals of Medical Research, vol. 25, no. 3, May 2021, pp. 0355-8, http://annalsmedres.org/index.php/aomr/article/view/1474.