Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1973_12_2_a1, author = {A. N. Degtev}, title = {$tt$- and $m$-degrees}, journal = {Algebra i logika}, pages = {143--161}, publisher = {mathdoc}, volume = {12}, number = {2}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1973_12_2_a1/} }
A. N. Degtev. $tt$- and $m$-degrees. Algebra i logika, Tome 12 (1973) no. 2, pp. 143-161. http://geodesic.mathdoc.fr/item/AL_1973_12_2_a1/