Quadratic Extremality Conditions for Broken Extremals in the General Problem of the Calculus of Variations N. P. Osmolovskii OriginalPaper Pages: 3987 - 4122
Topological Analysis of Integrable Problems of Celestial Mechanics on a Sphere and Pseudosphere T. G. Vozmishcheva OriginalPaper Pages: 4123 - 4167
