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On the existence of three closed nonself-intersecting geodesics on manifolds homeomorphic to the 2-sphere. (English. Russian original) Zbl 0787.53034
Translation from Izv. Ross. Akad. Nauk, Ser. Mat. 56, No. 3, 605–635 (Russian) (1992; Zbl 0771.53027).

MSC:
53C22 Geodesics in global differential geometry
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