@misc{EngelWeberPetzoldtetal., author = {Engel, S. and Weber, H. and Petzoldt, Reiner and Seidl, Barbara and Wiehe, Wolfgang and Sperl, J.}, title = {An improved method of sperm selection by glasswool filtration}, series = {Andrologia}, volume = {33}, journal = {Andrologia}, number = {4}, issn = {1439-0272}, doi = {10.1046/j.1439-0272.2001.00434.x}, pages = {223 -- 230}, language = {en} }