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@article{MS2_1973__32_166299, author = {Melven Krom and Myren Krom}, title = {Free {Subgroups} and {Folners} {Conditions.}}, journal = {Mathematica Scandinavica}, pages = {242--244}, publisher = {mathdoc}, volume = {32}, year = {1973}, zbl = {0276.20028}, url = {http://geodesic.mathdoc.fr/item/MS2_1973__32_166299/} }
Melven Krom; Myren Krom. Free Subgroups and Folners Conditions.. Mathematica Scandinavica, Tome 32 (1973), pp. 242-244. http://geodesic.mathdoc.fr/item/MS2_1973__32_166299/