A. Basiri, S. Mehrabi, H. Kianian, A. Javaherforooshzadeh, and M. R. Kamranmanesh, “Blind Puncture in Comparison With Fluoroscopic Guidance in Percutaneous Nephrolithotomy: a Randomized Controlled Trial”, Urol J, vol. 4, no. 2, pp. 79–85, Feb. 2009.