Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TDM_1998_2_a14, author = {V. N. Sachkov}, title = {The reduction {operator.~I}}, journal = {Trudy po diskretnoj matematike}, pages = {282--295}, publisher = {mathdoc}, volume = {2}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TDM_1998_2_a14/} }
V. N. Sachkov. The reduction operator.~I. Trudy po diskretnoj matematike, Trudy po Diskretnoi Matematike, Tome 2 (1998), pp. 282-295. http://geodesic.mathdoc.fr/item/TDM_1998_2_a14/