1. Japanese Breast Cancer Society. General rules for clinical and pathological recording of breast cancer. 18th ed. Tokyo: Kanehara Shuppan; 2018. p. 23–67.
2. Lakhani SR, Ellis IO, Schnitt SJ, Tan PH, van de Vijver MJ, editors. WHO classification of tumours of the breast. 4th ed. Lyon: International Agency for Research on Cancer; 2012.
3. Japanese Breast Cancer Society. General rules for clinical and pathological recording of breast cancer. 17th ed. Tokyo: Kanehara Shuppan; 2012. p. 22–34.
4. Japanese Orthopaedic Association Committee of Tumors. General rules for clinical and pathological studies on malignant soft tissue tumor. 4th ed. Tokyo: Kanehara Shuppan; 2015.