Nabi, Mushood G., et al. “Estrogen Receptors, Progesterone Receptors and Their Correlation With Respect to HER-2 Neu Status, Histological Grade, Size of Lesion, Lymph Node Metastasis, Lymphovascular Involvement and Age in Breast Cancer Patients in a Hospital in North India”. Asian Journal of Medical Sciences, vol. 7, no. 3, Jan. 2016, pp. 28-34, https://nepjol.info/index.php/AJMS/article/view/13563.