TY  - JOUR
AU  - I. P. Egorova
TI  - The problem with periodicity conditions for the equations of mixed type with characteristic degeneracy
JO  - Vestnik Samarskogo universiteta. Estestvennonaučnaâ seriâ
PY  - 2009
SP  - 15
EP  - 27
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VSGU_2009_8_a1/
LA  - ru
ID  - VSGU_2009_8_a1
ER  -