@article{IVM_2006_10_a3,
     author = {V. V. Kartak},
     title = {Extensions of point-invariant classes of third-order ordinary-differential equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {29--32},
     publisher = {mathdoc},
     number = {10},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2006_10_a3/}
}