Knapstein, P. G.; Hawighorst-Knapstein, S.; Stief, C.; Krychman, M.; Levine, D. A. In Hoskins, W. J.; Perez, C. A.; Young, R. C.; Barakat, R. R.; Maurie, M.; Randall, M. E. (Eds.) Principles and Practice of Gynecologic Oncology. 4th ed (2005)