4Zavos. Preparation of human frozen-thawed seminal specimens using the Sperm Prep TM filtration method:improvements over the conventional swim-up method[J].Fertility and Sterility,.
5Zavos PM,Correa JR,Zarmakoupis-Zavos. Effect of seminal viscosity difficulties with a chymotrypsin on the recovery of spermatozoa for assisted reproductive technologies:comparison between the Sperm Prep TM filtration and Percoll gradient centrifugation methods[J].MEFS,1997,(03):223.