@article{AL_2012_51_2_a4,
     author = {I. V. Latkin},
     title = {Recognition complexity of theories and their computational expressivity},
     journal = {Algebra i logika},
     pages = {216--238},
     year = {2012},
     volume = {51},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2012_51_2_a4/}
}