Soyupek, S., O. Kilic, A. Armagan, A. Ozorak, and H. Perk. “The Relationship Between Post-Voiding Residual Urine Existance and Urinary Tract Infections”. Annals of Medical Research, vol. 14, no. 2, May 2021, pp. 0081-4, http://annalsmedres.org/index.php/aomr/article/view/3164.