@article{AL_2007_46_6_a5,
     author = {A. I. Stukachev},
     title = {Degrees of presentability of {structures.~I}},
     journal = {Algebra i logika},
     pages = {763--788},
     publisher = {mathdoc},
     volume = {46},
     number = {6},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2007_46_6_a5/}
}