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@article{AM2_1987__33_137208, author = {C. Alsina and A. Sklar}, title = {A characterization of continuous associative operations whose graphs are ruled surfaces.}, journal = {Aequationes mathematicae}, pages = {114--119}, publisher = {mathdoc}, volume = {33}, year = {1987}, zbl = {0625.39008}, url = {http://geodesic.mathdoc.fr/item/AM2_1987__33_137208/} }
C. Alsina; A. Sklar. A characterization of continuous associative operations whose graphs are ruled surfaces.. Aequationes mathematicae, Tome 33 (1987), pp. 114-119. http://geodesic.mathdoc.fr/item/AM2_1987__33_137208/