@article{1178243378,
author = {Hsu, Chen-jung and Houh, Chorng-shi},
title = {Note on the integrability conditions of $(\varphi ,\,\psi)$-structures},
journal = {Tohoku Math. J. (2)},
volume = {18},
number = {4},
year = {1966},
pages = { 368-377},
language = {en},
url = {http://dml.mathdoc.fr/item/1178243378}
}
Hsu, Chen-jung; Houh, Chorng-shi. Note on the integrability conditions of $(\varphi ,\,\psi)$-structures. Tohoku Math. J. (2), Tome 18 (1966) no. 4, pp. 368-377. http://gdmltest.u-ga.fr/item/1178243378/