1. Theory of torsion of thin-walled bars with variable rigidity;Cywinski;Arch. Inzynieru Ladovej,1964
2. Nonuniform torsion of thin-walled bars of variable cross section;Bazant;Int. Assoc. Bridge Struct. Eng.,1965
3. Torsional response of tapered I-girders;Lee;ASCE J. Struct. Div.,1967
4. The torsion of thin-walled bars with variable cross section;Wilde;Arch. Mech. Stosowanej,1968
5. Elastic stability of tapered I-beams;Kitipornchai;ASCE J. Struct. Div.,1972