@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/