Lidya Mamonto, et al. “The Relationship of CXC Chemokine Receptor 4 (CXCR4) Expression With Histopathological Grading of Invasive Breast Cancer”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 64, no. 1, Sept. 2022, pp. 41-49, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/14555.