TY  - JOUR
AU  - S. Ya. Startsev
TI  - Structure of set of symmetries for  hyperbolic systems of  Liouville type and generalized Laplace invariants
JO  - Ufa mathematical journal
PY  - 2018
SP  - 103
EP  - 110
VL  - 10
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UFA_2018_10_4_a9/
LA  - en
ID  - UFA_2018_10_4_a9
ER  -