Gupta, N., B. Goswami, S. S. Khangarot, and N. S. Hadke. “Evaluation of Serum PSA Levels As a Biomarker for Breast Carcinoma in North Indian Females”. Asian Journal of Medical Sciences, vol. 5, no. 4, May 2014, pp. 25-28, doi:10.3126/ajms.v5i4.7800.