1. Die geographische Verbreitung der Seegräser;Ascherson,1906
2. The recent migration of Indo-Pacific algae from the Red Sea into the Mediterranean;Aleem;New Phytol.,1948
3. The occurrence of the sea-grass: Halophila stipulacea (Forsk.) Asch. of the west coast of Egypt;Aleem;Bull. Fac. Sci. Univ. Alexandria,1962
4. The sea-grasses of the world;Den Hartog;Verh. K. Ned. Akad. Wet., Afd. Natuurk. Reeks 2,1970
5. Range extension of Halophila stipulacea (Hydrocharitaceae) in the Mediterranean;Den Hartog;Blumea,1972