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@article{AL_1965_4_2_a3, author = {Diana Brignole and Hugo Ribeiro}, title = {On the universal equivalence for ordered abelian groups}, journal = {Algebra i logika}, pages = {51--55}, publisher = {mathdoc}, volume = {4}, number = {2}, year = {1965}, language = {en}, url = {http://geodesic.mathdoc.fr/item/AL_1965_4_2_a3/} }
Diana Brignole; Hugo Ribeiro. On the universal equivalence for ordered abelian groups. Algebra i logika, Tome 4 (1965) no. 2, pp. 51-55. http://geodesic.mathdoc.fr/item/AL_1965_4_2_a3/