Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1990__25_a3, author = {Anthony W. Hager and James J. Madden}, title = {Algebraic {Classes} of {Abelian} {Torsion-Free} and {Lattice-Ordered} {Groups}}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {53-63}, publisher = {mathdoc}, volume = {25}, year = {1990}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1990__25_a3/} }
Anthony W. Hager; James J. Madden. Algebraic Classes of Abelian Torsion-Free and Lattice-Ordered Groups. Ευκλείδης Γ , Tome 25 (1990), p. 53-63. http://geodesic.mathdoc.fr/item/EUG_1990__25_a3/