@article{CMUC_1981_22_1_a11,
     author = {Kub\'at, V\'aclav},
     title = {On simultaneous integrability of two commuting almost tangent structures},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {149--160},
     year = {1981},
     volume = {22},
     number = {1},
     mrnumber = {609943},
     zbl = {0456.53021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1981_22_1_a11/}
}