@article{1178229974, author = {Shimano, Takashi}, title = {An invariant of systems in the ergodic theory}, journal = {Tohoku Math. J. (2)}, volume = {30}, number = {4}, year = {1978}, pages = { 337-350}, language = {en}, url = {http://dml.mathdoc.fr/item/1178229974} }
Shimano, Takashi. An invariant of systems in the ergodic theory. Tohoku Math. J. (2), Tome 30 (1978) no. 4, pp. 337-350. http://gdmltest.u-ga.fr/item/1178229974/