TY  - JOUR
AU  - E. K. Makarov
AU  - I. V. Marchenko
TI  - On upward mobility of the highest exponent of a linear differential system under perturbations of the coefficients from the simplest classes with degeneracies
JO  - Trudy Instituta matematiki
PY  - 2017
SP  - 50
EP  - 59
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMB_2017_25_2_a4/
LA  - ru
ID  - TIMB_2017_25_2_a4
ER  -