Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1998_37_3_a4, author = {V. M. Kopytov}, title = {Preorderability of groups of formal power series}, journal = {Algebra i logika}, pages = {301--319}, publisher = {mathdoc}, volume = {37}, number = {3}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1998_37_3_a4/} }
V. M. Kopytov. Preorderability of groups of formal power series. Algebra i logika, Tome 37 (1998) no. 3, pp. 301-319. http://geodesic.mathdoc.fr/item/AL_1998_37_3_a4/