%0 Journal Article %A Donald Orth %T Welding Riemann Surfaces and Transmission Problems with Shifts. %J Commentarii mathematici Helvetici %D 1969 %P 120-137 %V 44 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1969__44_139387/ %F CMH_1969__44_139387