@article{RM_1987_42_5_a11,
     author = {B. A. Khesin},
     title = {Homogeneous vector fields and {Whitney} umbrellas},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {171--172},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1987_42_5_a11/}
}