TY  - JOUR
AU  - A. P. Gurevich
AU  - A. P. Khromov
TI  - First and second order differentiation operators with weight functions of variable sign
JO  - Matematičeskie zametki
PY  - 1994
SP  - 3
EP  - 15
VL  - 56
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1994_56_1_a0/
LA  - ru
ID  - MZM_1994_56_1_a0
ER  -