@article{1077303209, author = {Craig, W. and Simon, B.}, title = {Subharmonicity of the Lyaponov index}, journal = {Duke Math. J.}, volume = {50}, number = {1}, year = {1983}, pages = { 551-560}, language = {en}, url = {http://dml.mathdoc.fr/item/1077303209} }
Craig, W.; Simon, B. Subharmonicity of the Lyaponov index. Duke Math. J., Tome 50 (1983) no. 1, pp. 551-560. http://gdmltest.u-ga.fr/item/1077303209/