Wajeeha Arshad, Salma Rehmat, Sana Qurban, Naheed Hanif, Naseer Ud Din, and Asma Niaz Khan. “Association of Gallbladder Position and Anatomical Variations on Ultrasound With Operative Difficulty During Laparoscopic Cholecystectomy”. International Journal of Pharmacy Research & Technology (IJPRT), vol. 16, no. 2, Sept. 2026, pp. 4487-94, https://ijprt.org/index.php/pub/article/view/3047.