“Differences in the Spermatozoa and Ova of Two Species of Giant African Land Snails (Archachatina Marginata and Achatina Achatina)”. Nigerian Journal of Animal Production 34, no. 2 (January 9, 2021): 306–315. Accessed November 9, 2026. https://www.njap.org.ng/index.php/njap/article/view/1211.