WAQAR AHMED MEMON; SALMAN EL KHALID; ALI HAIDER; SHERJEEL SAULAT; SHARIQ ANIS KHAN; MUHAMMAD BILAL QUDDUS; KHADIJAH ABID. Comparative evaluation of upper versus lower calyceal approach in percutaneous nephrolithotomy (1) for managing renal calculi. Journal of the Pakistan Medical Association, [S. l.], v. 71, n. 2, p. 602–607, 2020. DOI: 10.47391/JPMA.461. Disponível em: https://jpma.org.pk/index.php/public_html/article/view/1988. Acesso em: 5 may. 2026.