1. Mecanique Analytique;Lagrange,1788
2. Methodes Nouvelles de la Mechanique Celeste;Poincare,1899
3. A theory of the amplitude of free and forced triode vibrations;van der Pol;Radio Rev.,1920
4. Forced Oscillations in a Circuit with Non-Linear Resistance (Receptance with Reactive Triode);van der Pol,1927
5. Sur le mouvement d’un systeme soumis ‘a des forces a courte periode;Fatou;Bull. Soc. Math.,1928