@article{SM_1967_3_2_a8,
     author = {M. M. Lesokhin},
     title = {On separability of subsemigroups by complex characters},
     journal = {Sbornik. Mathematics},
     pages = {295--301},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1967_3_2_a8/}
}