Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2000_68_5_a13, author = {S. G. Ivanov}, title = {$Q${-Transformations} and $Q${-Equivalence}}, journal = {Matemati\v{c}eskie zametki}, pages = {783--785}, publisher = {mathdoc}, volume = {68}, number = {5}, year = {2000}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_5_a13/} }
S. G. Ivanov. $Q$-Transformations and $Q$-Equivalence. Matematičeskie zametki, Tome 68 (2000) no. 5, pp. 783-785. http://geodesic.mathdoc.fr/item/MZM_2000_68_5_a13/