A. E. H. Abdallah, A. B. Abusharib, A. M. Elbashir, and I. H. Nourien, “Utility of urinary calcium/creatinine ratio in evaluation of urinary stone formers: a Sudanese case control study”, Int J Res Med Sci, vol. 5, no. 1, pp. 146–149, Dec. 2016.