Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ho,Biochemical characterization of avian spermatozoan acrosin and comparison of its properties to those of bovine trypsin and mammalian acrosins,Comp Biochem Physiol,,,1976,54,,213,https://cir.nii.ac.jp/crid/1371132819006233731,