Muhammad Zeb, Muhammad Zarin, Ijaz Ahmad Khan, Samiullah, Muhammad Younas Khan, Kaleemullah. “Scope of Laparoscopic Cholecystectomy in Patient With History of Previous Upper Abdominal Surgery”. Pakistan Journal of Medical & Health Sciences, vol. 17, no. 02, Mar. 2023, p. 518, doi:10.53350/pjmhs2023172518.