@article{RM_1980_35_4_a12,
     author = {A. Yu. Ol'shanskii},
     title = {On the problem of the existence of an invariant mean on a~group},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {180--181},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_4_a12/}
}