^Male Infertility Best Practice Policy Committee of the American Urological Association; Practice Committee of the American Society for Reproductive Medicine. Infertility: Report on Evaluation of the Azoospermic Male(PDF). American Urological Association; American Society for Reproductive Medicine. 2001 [2017-07-27]. ISBN 978-0-9649702-8-1. (原始内容(PDF)存档于2018-03-26).