| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Critical Points at Infinity in Some Variational Problems | Paperback | 978-0-470-21147-2 | 1989 | A. Bahri |
| Flow Lines and Algebraic Invariants in Contact Form Geometry | " | 978-1-4612-6576-4 | 2012 | |
| Flow Lines and Algebraic Invariants in Contact Form Geometry | Hardcover | 978-0-8176-4318-8 | 2003 | |
| Pseudo-orbits of contact forms | Paperback | 978-0-470-21065-9 | 1988 | |
Birkhauser · Springer · Wiley