1. Students’ Flora of Egypt;Täckholm,1974
2. Desert vegetation of Israel and Sinai;Danin,1983
3. Gibbali MA. Studies on the flora of northern Sinai. M.Sc. Thesis. Fac. Science. Egypt: Cairo Univ.; 1988. p. 393.
4. Boulos L. Flora of Egypt. Geraniaceae-Boraginaceae, vol. 2. Cairo, Egypt: Al Hadara Publishing; 2000.
5. Vegetation–environment relationships along El-Salam Canal, Egypt;Serag;Environmetrics,2001