| title | ISBN-13 | year of publication |
|---|---|---|
| Contributions to the Theory of Nonlinear Oscillations, Vol. 1 | 978-0-527-02736-0 | 1925 |
| Contributions to the Theory of Nonlinear Oscillations, Vol. 2 | 978-0-527-02745-2 | 1925 |
| Contributions to the Theory of Nonlinear Oscillations, Vol. 3 | 978-0-527-02753-7 | 1925 |
| Contributions to the Theory of Nonlinear Oscillations, Vol. 5 | 978-0-527-02761-2 | 1925 |