@article{AL_1984_23_4_a5,
     author = {I. L. Mel'nichuk},
     title = {Undecidability of the problems of equality and divisibility in},
     journal = {Algebra i logika},
     pages = {430--438},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1984_23_4_a5/}
}