@article{IM2_1978_12_3_a7,
     author = {G. U. Oganesyan},
     title = {On the problems of equality and divisibility of words in a~semigroup with a~defining relation of the from},
     journal = {Izvestiya. Mathematics },
     pages = {557--566},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1978_12_3_a7/}
}