Immo Schroeder-Printzen, Martin Ludwig, Frank Köhn, Wolfgang Weidner: Surgical therapy in infertile men with ejaculatory duct obstruction: technique and outcome of a standardized surgical approach. In: Human Reproduction. Band 15, Nr. 6, Juni 2000, S. 1364–1368, doi:10.1093/humrep/15.6.1364.