“The efficacy, safety & outcomes of laparoscopic pyelolithotomy (retroperitoneoscopic pyelolithotomy) and its comparison with percutaneous nephrolithotomy”, Int J of Biomed & Adv Res, vol. 6, no. 4, pp. 363–367, Apr. 2015, doi: 10.7439/ijbar.v6i4.1968.