R. I. ELSheshtawy, G. A. ELsisy, and W. said El-Nattat, “Assessment of Bull Semen Cryopreservation Extended in Tris Extender Enriched with Green Tea Extract.: Effect of green tea on cattle semen”, ijmscrr, vol. 4, no. 03, pp. Page: 13–20, May 2021.