1. Middle-upper Cenomanian echinoids from north Wadi Qena, North Eastern Desert, Egypt;Abdelhamid;Cretaceous Research,2014
2. Upper Cretaceous echinoids from Gebel El-Hamra and Gebel El-Minsherah, North Sinai, Egypt M.E.R.C. Ain Shams University;Abdelhamid;Earth Science Series,2001
3. Aptian-Cenomanian echinoids from Egypt;Abdelhamid;Revue de Paléobiologie,2003
4. Additional echinoids from the Late Maestrichitian (Cretaceous) of Gebel el Rowdah, Oman – United Arab Emirates. Neues Jahrbuch für Geologie und Paläontologie;Ali;Monatsshefte,1992
5. Echinoids from the Galala Formation (Upper Cretaceous, Cenomanian) of the Ras Gharib-Sheikh Fadl road, Eastern Desert, Egypt;Ali;Cretaceous Research,2015