Mishra, N., A. K. Singh, M. Chandra Vamsi Krishna, U. Gautam, and M. K. Mishra. “Evaluating Upper Versus Lower Calyceal Access in Percutaneous Nephrolithotomy: A Prospective Comparative Study in Complex Renal Calculi”. International Journal of Research in Medical Sciences, vol. 13, no. 10, Sept. 2025, pp. 4268-72, doi:10.18203/2320-6012.ijrms20253176.