7Olar T T, Bowen R A, Pickett B W. Influence of extender, Cryopreservative and seminal processing Procedure on post thaw motility of canine spermatozoa frozening straws [ J]. Theriogenlogy, 1989, 31 (2) :451-461.
8Olar TT, Bowen RA and Pickett BW Influence of extender, Cryopreservative and seminal processing Procedure on post thaw motility of canine spermatozoa frozening straws. Tberiogenlogy, 1989,31(2):451-461.