%0 Journal Article %A Opic, Bohumír %A Gurka, Petr %T $A_r$-condition for two weight functions and compact imbeddings of weighted Sobolev spaces %J Czechoslovak Mathematical Journal %D 1988 %P 611-617 %V 38 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102257/ %R 10.21136/CMJ.1988.102257 %G en %F 10_21136_CMJ_1988_102257