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On differentiable manifolds with certain structures which are closely related to almost contact structure. I. (English) Zbl 0192.27903

MSC:
53D15 Almost contact and almost symplectic manifolds
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References:
[1] C. EHRESMANN, Sur les varietes presque complexes, Proc. Int.Congr. Math.Harvard, 412-419. · Zbl 0049.12904
[2] B. EcKMANN AND A. FROIICHER, Sur l’integrabilite des structures presque complexes, C. R. Acad. Sci., 232(1951), 2248-2286. · Zbl 0042.40503
[3] W. M. BOOTHBY AND H. C. WANG, On contact manifolds, Ann. of Math., 68(1958), 721-734. JSTOR: · Zbl 0084.39204
[4] J. W. GRAY, Some global properties of contact structures, Ann. of Math., 69(1959), 421-450. JSTOR: · Zbl 0092.39301
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