%0 Journal Article %A Kreyszig, Erwin %T Function Theoretic Integral Operator Methods for Partial Differential Equations(1) %J Canadian mathematical bulletin %D 1980 %P 127-135 %V 23 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-018-0/ %R 10.4153/CMB-1980-018-0 %F 10_4153_CMB_1980_018_0