1. M. B. S. Al-Yusuf, and B. R. Yasser, “Invertebrate Science - Practical Slit,” King Saud University. Saudi. 2002.
2. J. Oehlmannand, and U. Schulte-Oehlmann, “Molluscs as bioindicators. In Markert, B.A.; Breure, A.M. and Zechmeister, H.G. Bioindicators and Biomonitors Principles, Concepts and Applications. First ed. Netherlands. 2003.
3. M.P. Kerney, Cameron RAD. “A Field Guide to the Land Snails of Britain and North-West Europe,” Collins, London, UK. 1979.
4. D. Godan. “Pest Slugs and Snails Biology and control,” Springer Verlag, Berlin Heidelberg, Germany. 1983.
5. H.I. El-Deeb, M. Wilson, E.H. Eshara, “Ecological studies on certain land snails infest some economic crops at Beheira Governorate, Egypt,” Proceedings of 2nd Intentional Conference Pest Control. 19–28, Mansoura, Egypte. 1999.