Kumar, P. G., and P. Venkateswaran. “Clinical Study of Nodal Involvement in Carcinoma Penis: Role of Perineural and Perivascular Invasion in Lymph Node Metastasis”. International Surgery Journal, vol. 5, no. 6, May 2018, pp. 2252-5, doi:10.18203/2349-2902.isj20182232.