@article{RM_1969_24_3_a17,
     author = {E. S. Lyapin and L. N. Shevrin},
     title = {International {Symposium} on {Semigroup} {Theory}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1969_24_3_a17/}
}