@article{01208832,
title = {On exactness of upper estimates of the characteristic exponent of a linear system with exponentially decreasing perturbations.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {12},
year = {1997},
pages = {174-177},
zbl = {0939.34508},
language = {en},
url = {http://dml.mathdoc.fr/item/01208832}
}
Izobov, N.A.; Batan, S.N. On exactness of upper estimates of the characteristic exponent of a linear system with exponentially decreasing perturbations.. Memoirs on Differential Equations and Mathematical Physics, Tome 12 (1997) pp. 174-177. http://gdmltest.u-ga.fr/item/01208832/