@article{MZM_2012_91_2_a4,
     author = {Yu. F. Korobeinik},
     title = {On {Free} {Representing} {Systems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {214--224},
     publisher = {mathdoc},
     volume = {91},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2012_91_2_a4/}
}