@article{01208831,
title = {Estimates of the lower exponent of a two-dimensional linear system under Perron perturbations.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {12},
year = {1997},
pages = {170-173},
zbl = {0917.34038},
language = {en},
url = {http://dml.mathdoc.fr/item/01208831}
}
Izobov, N. Estimates of the lower exponent of a two-dimensional linear system under Perron perturbations.. Memoirs on Differential Equations and Mathematical Physics, Tome 12 (1997) pp. 170-173. http://gdmltest.u-ga.fr/item/01208831/