@article{1178244246, author = {Hsu, Chen-jung}, title = {Note on $(\phi,\,\xi ,\,\eta)$-structure}, journal = {Tohoku Math. J. (2)}, volume = {13}, number = {3}, year = {1961}, pages = { 434-442}, language = {en}, url = {http://dml.mathdoc.fr/item/1178244246} }
Hsu, Chen-jung. Note on $(\phi,\,\xi ,\,\eta)$-structure. Tohoku Math. J. (2), Tome 13 (1961) no. 3, pp. 434-442. http://gdmltest.u-ga.fr/item/1178244246/