@article{VMUMM_2005_5_a6,
     author = {O. E. Dolgaleva},
     title = {Singularities of {Goursat} distributions in optimal control problems},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {34--39},
     year = {2005},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2005_5_a6/}
}