Shah, Z., A. S. Khan, S. A. Paracha, and M. Javed. “THE IMPACT OF ANATOMICAL VARIATION OF LOWER POLE COLLECTING SYSTEM OF KIDNEY ON STONE FORMATION”. KHYBER MEDICAL UNIVERSITY JOURNAL, vol. 4, no. 2, June 2012, pp. 54-58, https://www.kmuj.kmu.edu.pk/article/view/8777.