@article{bwmeta1.element.desklight-45a77367-0751-49f1-9748-2ba6148b62c8,
author = {W. L. Kulik},
title = {Sign changing Lyapunov functions and perturbation of invariant tori of dynamical systems},
journal = {Banach Center Publications},
volume = {23},
year = {1989},
pages = {385-389},
zbl = {0698.34044},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-45a77367-0751-49f1-9748-2ba6148b62c8}
}
W. L. Kulik. Sign changing Lyapunov functions and perturbation of invariant tori of dynamical systems. Banach Center Publications, Tome 23 (1989) pp. 385-389. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-45a77367-0751-49f1-9748-2ba6148b62c8/