Raman, Srinivasan, et al. “An Observational Study on Immunohistochemical Expression Profile of PCNA in Urothelial Carcinoma of Bladder and Association With Clinicopathological Parameters”. Journal of Neonatal Surgery, vol. 14, no. 21S, May 2025, pp. 873-9, https://jneonatalsurg.com/index.php/jns/article/view/5391.