@article{AL_1989_28_4_a5,
     author = {A. I. Omarov},
     title = {Locally finite countable-category {Horn} theories},
     journal = {Algebra i logika},
     pages = {444--453},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1989_28_4_a5/}
}