1. On the Behavior of Constrained Elastic Rings;El-Bayoumy,1969
2. Thermal buckling of circular cylindrical shells subjected to external constraints (in Swedish);Bergman;Tekniska Skrifter, hgg. v. Svenska Teknologföreningen,1948
3. Uber das Einbeulen von Druckschachtpanzerung;Chwalla;Osterr. Bauzeitschr,1957
4. Eine Bemerkung zur Frage des Beulens ummantelter Schalen;Mettler;Der Bauingenieur,1963
5. The stability of a uniformly compressed ring surrounded by a rigid circular surface;Chan;Int. J. Mech. Sci.,1966