Kumar, S., K. L. Kumari, P. V. Babu, K. A. Latha, and P. K. Kumari. “Idiopathic Gynaecomastia in Twins: A Case Report”. International Journal of Research in Medical Sciences, vol. 2, no. 4, Jan. 2017, pp. 1755-7, https://www.msjonline.org/index.php/ijrms/article/view/2506.