@article{AL_1990_29_5_a5,
     author = {S. T. Fedoryaev},
     title = {Some properties of algebraic reducibility of},
     journal = {Algebra i logika},
     pages = {597--612},
     publisher = {mathdoc},
     volume = {29},
     number = {5},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1990_29_5_a5/}
}