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@article{10_4064_aa_22_1_11_20, author = {Nina Spears}, title = {A problem involving simultaneous binary compositions}, journal = {Acta Arithmetica}, pages = {11--20}, publisher = {mathdoc}, volume = {22}, number = {1}, year = {1972}, doi = {10.4064/aa-22-1-11-20}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-22-1-11-20/} }
Nina Spears. A problem involving simultaneous binary compositions. Acta Arithmetica, Tome 22 (1972) no. 1, pp. 11-20. doi : 10.4064/aa-22-1-11-20. http://geodesic.mathdoc.fr/articles/10.4064/aa-22-1-11-20/
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