“The Efficacy, Safety & Outcomes of Laparoscopic Pyelolithotomy (retroperitoneoscopic Pyelolithotomy) and Its Comparison With Percutaneous Nephrolithotomy”. International Journal of Biomedical and Advance Research, vol. 6, no. 4, Apr. 2015, pp. 363-7, https://doi.org/10.7439/ijbar.v6i4.1968.