@article{AL_2002_41_3_a2,
     author = {A. V. Kravchenko},
     title = {$\mathcal Q${-Universal} {Quasivarieties} of {Graphs}},
     journal = {Algebra i logika},
     pages = {311--325},
     publisher = {mathdoc},
     volume = {41},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2002_41_3_a2/}
}