@article{AL_2008_47_4_a1,
     author = {N. T. Kogabaev},
     title = {The class of projective planes is noncomputable},
     journal = {Algebra i logika},
     pages = {428--455},
     publisher = {mathdoc},
     volume = {47},
     number = {4},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2008_47_4_a1/}
}