@article{MAN_1976__223_162873,
     author = {Chao-Chu Liang},
     title = {On the {Volume-Preserving} {Foliations.}},
     journal = {Mathematische Annalen},
     pages = {13--18},
     publisher = {mathdoc},
     volume = {223},
     year = {1976},
     zbl = {0314.57017},
     url = {http://geodesic.mathdoc.fr/item/MAN_1976__223_162873/}
}