@article{CMJ_2008_58_3_a2,
     author = {Tryhuk, V.},
     title = {Equivalence and symmetries of first order differential equations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {605--635},
     year = {2008},
     volume = {58},
     number = {3},
     mrnumber = {2455926},
     zbl = {1174.34051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008_58_3_a2/}
}