TY  - JOUR
AU  - L. G. Kovalenko
TI  - Rate of approximation of functions by negative-order C\'esaro means of double orthogonal series
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 2004
SP  - 72
EP  - 75
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_2004_2_a8/
LA  - ru
ID  - IVM_2004_2_a8
ER  -