Raphael, . J., V. Abhulimen, O. Danagogo, and N. Anuale. “Anti-Retropulsion Device Use for Prevention of Proximal Stone Migration During Laser Lithotripsy- Case Report”. Nigerian Journal of Urology, vol. 10, no. 1 & 2, June 2022, p. 34, https://nju.org.ng/index.php/nju/article/view/12.