@article{AL_2015_54_2_a4,
     author = {J. Johnson and J. F. Knight and V. Ocasio and J. Tussupov and S. VanDenDriessche},
     title = {Preserving categoricity and complexity of relations},
     journal = {Algebra i logika},
     pages = {212--235},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2015_54_2_a4/}
}