2) Kjellgren, O.: The cytologic diagnosis of the breast, Acta Cytol., 8: 216-223, 1964.
3) Masukawa, T., et al.: The cytologic examination of breast secretions, Acta Cytol., 10: 261-265, 1966.
4) Masukawa, T.: Discovery of psammoma bodies and fungus organisms in the nipple secretion with improved breast cytology technique, Acta Cytol., 16: 408-415, 1972.