1. The Dynamic Stability of Elastic Systems;Bolotin,1964
2. Dynamic Stability of Structures,1967
3. Stability of Elastic Systems;Vol'mir,1963
4. Ordinary Non-linear Differential Equations in Engineering and Physical Sciences;McLachlan,1950
5. An investigation of the non-linear dynamical stability of rectangular plates with initial imperfections (in Bulgarian);Kisliakov,1962