Sadek, S, et al. “Comparison Of Urinary Bladder Volume In Children Using Suprapubic Ultrasonic Bi-Planner Technique With Voided Urine Volume”. Journal of Dhaka National Medical College & Hospital, vol. 17, no. 2, Oct. 2012, pp. 4-7, doi:10.3329/jdnmch.v17i2.12199.