1. Elastic Stability Analysis of Plane Rectangular Frames with Varying Stiffness Members;Ermopoulos,1984
2. Buckling of tapered bars under stepped axial loads;Ermopoulos;J. Struct. Eng., ASCE,1986
3. Stability of frames with tapered built-up members;Ermopoulos;J. Struct. Eng., ASCE,1985
4. Flambement des poteaux à inertie variable;Galea;Construction Metallique,1981
5. The Stability of Frames;Horne,1965