@article{RM_1974_29_1_a15,
     author = {I. B. Kozhukhov},
     title = {Chain semigroup ring},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1974},
     volume = {29},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_1_a15/}
}