1. Asymptotic solutions of the equations of classical mechanics;Kozlov;PMM,1982
2. On asymptotic solutions of the equations of classical mechanics;Kozlov;Dokl. Akad. Nauk SSSR,1982
3. A hypothesis on the existence of asymptotic motions in classical mechanics;Kozlov;Funktsional'nyi analiz i ego prilozheniya,1982
4. On the stability of equilibrium in a potential field;Palamodov;Funktsional'nyi analiz i ego prilozheniya,1977
5. On the instability of equilibrium in a potential field;Kozlov;Uspekhi mat. nauk,1981