1. Stiffness and damping of critically loaded pre-stress concrete members;Spencer,1968
2. Ordinary Nonlinear Differential Equations in Engineering and Physical Sciences;McLauchlan,1956
3. The effect of gravity on the collapse of yielding structures with earthquake excitation;Husid,1969
4. Application of nonlinear analysis techniques;Iwan,1974
5. Duffing's equation in brain modelling;Zeeman;Bull. Inst. Math. Appl.,1976