TY  - JOUR
AU  - R. Semerdjieva
TI  - On a Class of Hyperbolic Equations with Order Degeneration
JO  - Mathematica balkanica
PY  - 2001
SP  - 75
VL  - 15
IS  - 1-2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a7/
ID  - MABA_2001_15_1-2_a7
ER  -