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@article{SF_1976__13_134198, author = {H. J. Weinert}, title = {On semigroups of left inner type.}, journal = {Semigroup forum}, pages = {85--91}, publisher = {mathdoc}, volume = {13}, year = {1976}, zbl = {0326.20053}, url = {http://geodesic.mathdoc.fr/item/SF_1976__13_134198/} }
H. J. Weinert. On semigroups of left inner type.. Semigroup forum, Tome 13 (1976), pp. 85-91. http://geodesic.mathdoc.fr/item/SF_1976__13_134198/