1. Vibration problems in engineering;Timoshenko,1974
2. Structural dynamics by finite elements;Weaver,1987
3. Natural frequencies of thin-walled bars of open cross section;Roberts;J. Struct. Eng.,1987
4. Vibrational analysis of thin-walled bars with open cross sections;Wekezer;J. Struct. Eng.,1989
5. Free vibration of thin-walled bars with open cross sections;Wekezer;J. Struct. Eng.,1987