@article{MZ_1991__207_2_174259,
     author = {J. Barbosa and K. Kenmotsu and G. Oshikiri},
     title = {Foliations by hypersurfaces with constant mean curvature.},
     journal = {Mathematische Zeitschrift},
     pages = {97--108},
     publisher = {mathdoc},
     volume = {207},
     number = {2},
     year = {1991},
     zbl = {0731.53033},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__207_2_174259/}
}