La, Van Phu, et al. “FEATURES OF CLINICAL SYMPTOMS, TRANSABDOMINAL ULTRASONOGRAPHY AND COMPUTED TOMOGRAPHY OF CHOLEDOCHOLITHIASIS IN ELDERLY PATIENTS”. Cantho Journal of Medicine and Pharmacy, no. 45, June 2023, pp. 184-91, https://tapchi.ctump.edu.vn/index.php/ctump/article/view/1010.