Hilgers, T. W. (2004). Chapter 76: PEARS for the Fallopian Tubes: Distal Occlusions and Other Applications. *The Medical and Surgical Practice of NaProTECHNOLOGY*, 1031-1044.
Hilgers TW. Chapter 76: PEARS for the Fallopian Tubes: Distal Occlusions and Other Applications. The Medical and Surgical Practice of NaProTECHNOLOGY. 2004:1031-1044.
Hilgers, T. W. "Chapter 76: PEARS for the Fallopian Tubes: Distal Occlusions and Other Applications." *The Medical and Surgical Practice of NaProTECHNOLOGY*, 2004, pp. 1031-1044.