@article{1178244407,
author = {Sasaki, Shigeo},
title = {On differentiable manifolds with certain structures which are closely related to almost contact structure, I},
journal = {Tohoku Math. J. (2)},
volume = {12},
number = {3},
year = {1960},
pages = { 459-476},
language = {en},
url = {http://dml.mathdoc.fr/item/1178244407}
}
Sasaki, Shigeo. On differentiable manifolds with certain structures which are closely related to almost contact structure, I. Tohoku Math. J. (2), Tome 12 (1960) no. 3, pp. 459-476. http://gdmltest.u-ga.fr/item/1178244407/