@article{INTD_1991_39_a1,
     author = {S. A. Vakhrameev},
     title = {Morse theory and {Lyusternik--Shnirel'man} theory in geometric control theory},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {41--117},
     publisher = {mathdoc},
     volume = {39},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1991_39_a1/}
}