@article{1102637371,
author = {Botelho, F.},
title = {Rotational entropy for annulus endomorphisms.},
journal = {Pacific J. Math.},
volume = {151},
number = {2},
year = {1991},
pages = { 1-19},
language = {en},
url = {http://dml.mathdoc.fr/item/1102637371}
}
Botelho, F. Rotational entropy for annulus endomorphisms.. Pacific J. Math., Tome 151 (1991) no. 2, pp. 1-19. http://gdmltest.u-ga.fr/item/1102637371/