Purnawaty, A., W. Hamdani, and I. D. Ganda. “Relationship of Grade, Intrinsic Subtype and Clinical Response to Neoadjuvant Chemotherapy In Breast Cancer”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 37, no. 1, Jan. 2018, pp. 34-42, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8579.