A. El-Nouri, A., and R. S. Ayoub. “Spermatogenesis in Mice Exposed to Hydroxyurea: Protecitve Effect of Ntural Apple Cider Vinegar”. Journal of Education and Science (JES), vol. 17, no. 3, June 2005, pp. 68-72, doi:10.33899/edusj.2005.82503.