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@article{JRAM_1969__236_150935, author = {K.F. Barth and W.J. Schneider}, title = {Exponentiation of functions in {MacLane's} class {A.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {120--130}, publisher = {mathdoc}, volume = {236}, year = {1969}, zbl = {0175.07801}, url = {http://geodesic.mathdoc.fr/item/JRAM_1969__236_150935/} }
K.F. Barth; W.J. Schneider. Exponentiation of functions in MacLane's class A.. Journal für die reine und angewandte Mathematik, Tome 236 (1969), pp. 120-130. http://geodesic.mathdoc.fr/item/JRAM_1969__236_150935/