1. Lateral stability of unsymmetrical I-beams and trusses in bending;Winter,1941
2. The lateral instability of unsymmetrical I-beams;Hill;J. Aero. Sci.,1942
3. Combined bending and torsion of I-beams of monosymmetric cross-section;Pettersson,1952
4. Torsion, bending and lateral buckling of I-beams;Nylander,1956
5. Thin Walled Elastic Beams;Vlasov,1961