1. The response of nonlinear multi-story structures subjected to earthquake excitation;Giberson,1967
2. Inealstic earthquake response of tall steel frames;Goel,1967
3. Inelastic earthquake response of tall buildings;Clough,1965
4. Dynamic analysis of elasto-plastic frames;Heidebrecht;J. Struct. Div. ASCE,1964
5. Approximate yield surface equations;Morris;J. Engng Mech. Div. ASCE,1969