%0 Journal Article %A Heins, Albert E. %T On an integral equation in diffraction theory %J Compositio Mathematica %D 1967 %P 49-54 %V 18 %N 1-2 %I P. Noordhoff N. V., Groningen %U http://www.numdam.org/item/CM_1967__18_1-2_49_0/ %G en %F CM_1967__18_1-2_49_0