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@article{SF_1976__12_134182, author = {T. Nordahl}, title = {Bands of power-joined semigroups.}, journal = {Semigroup forum}, pages = {299--312}, publisher = {mathdoc}, volume = {12}, year = {1976}, zbl = {0377.20048}, url = {http://geodesic.mathdoc.fr/item/SF_1976__12_134182/} }
T. Nordahl. Bands of power-joined semigroups.. Semigroup forum, Tome 12 (1976), pp. 299-312. http://geodesic.mathdoc.fr/item/SF_1976__12_134182/