TY  - JOUR
AU  - M. Filar
TI  - On a certain boundary problem for the equation \((\Delta + a^2)(\Delta + b^2) u = 0\)
JO  - Commentationes Mathematicae
PY  - 1976
SP  -  55
EP  - 66
VL  - 19
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.14708/cm.v19i1.5837/
DO  - 10.14708/cm.v19i1.5837
LA  - pl
ID  - 10_14708_cm_v19i1_5837
ER  -