On the ultimate behavior of orbits with respect to an unstable critical point I. Oscillating, asymptotic, and capture orbits
- 31 January 1969
- journal article
- research article
- Published by Elsevier in Journal of Differential Equations
- Vol. 5 (1), 136-158
- https://doi.org/10.1016/0022-0396(69)90108-9