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@article{AM2_1989__37_2-3_137309, author = {R. Craigen and Z. P\'ales}, title = {The associativity equation revisited.}, journal = {Aequationes mathematicae}, pages = {306--312}, publisher = {mathdoc}, volume = {37}, number = {2-3}, year = {1989}, zbl = {0676.39005}, url = {http://geodesic.mathdoc.fr/item/AM2_1989__37_2-3_137309/} }
R. Craigen; Z. Páles. The associativity equation revisited.. Aequationes mathematicae, Tome 37 (1989) no. 2-3, pp. 306-312. http://geodesic.mathdoc.fr/item/AM2_1989__37_2-3_137309/