@article{VNGU_2006_6_4_a0,
     author = {A. V. Borovskikh},
     title = {Equivalence groupes of eikonal equation and classes of equivalent equations},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {3--42},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2006_6_4_a0/}
}