1. On one generalization of Lyapunov stability criterion for the same systems;Demidovich;Mat. Sb.,1965
2. On motion stability in linear approximation;Oziraner;Prikl. Mat. Mekh.,1977
3. Stability of Motion: The Method of Integral Inequalities;Martynyuk,1989
4. Integral Inequalities and Applications;Bainov,1992
5. Differential and Integral Inequalities, Theory and Applications;Lakshmikahtham,1969