1. Methodes approchees de la mecanique non-lineaire dans leurs application a l’étude de la perturbation des mouvements periodiques de divers phenomenes de resonance s’y rapportant;Krylov,1935
2. Introduction to Nonlinear Mechanics;Krylov,1937
3. Introduction to Non-Linear Mechanics. (AM-11);Kryloff,1943
4. Asymptotic Methods in the Theory of Non-Linear Oscillations.;Bogoliubov,1961
5. Oscillations in Nonlinear Systems;Hale,1963