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References
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| 1. |
Lusternik L., Shnirelman L., “Sur le probleme de trois geodesiques fermees sur les surfaces de
genre $0$”, C.R. Acad. Sci. Paris, 189 (1929), 269–271  |
| 2. |
Lyusternik L. A., Shnirelman L. G., Topologicheskie metody v variatsionnykh zadachakh, Tr. Nauchno-issledovatelskogo in-ta matematiki i mekhaniki pri 1-om MGU, GITTL, M., 1930 |
| 3. |
Lyusternik L. A., Shnirelman L. G., “Topologicheskie metody v variatsionnykh zadachakh i ikh prilozheniya
k differentsialnoi geometrii poverkhnostei”, UMN, 2:1 (1947), 166–217   |
| 4. |
Lyusternik L. A., Topologiya funktsionalnykh prostranstv i variatsionnoe ischislenie v tselom, Tr. MIAN, 19, 1947 |
| 5. |
Ballmann W., Tkorbergsson G., Ziller W., “Existence of closed geodesies on positively curved manifolds”, J. of Diff. Geometry, 18 (1983), 221–252 |
| 6. |
Jost J., “A nonparametric proof of the theorem of Lusternik and Schnirelman”, Archiv der Mathematik, 53 (1989), 497–509  |
| 7. |
Grayson M. A., “Shortening embedded curves”, Annals of Mathematics, 129 (1989), 71–111 |
| 8. |
Klingenberg V., Lektsii o zamknutykh geodezicheskikh, Mir, M., 1982 |
| 9. |
Federer G., Geometricheskaya teoriya mery, Nauka, M., 1987 |
| 10. |
Ballmann W., “Der Satz von Lusternik und Schnirelmann”, Bonner Mathematische Schriften, 1978, no. 102, 1–25 |
| 11. |
Hass J., Scott P., Schortening curves on surfaces, Preprint, 1991 |
