%0 Journal Article %A M. A. Shubin %T On the index of families of Wiener--Hopf operators %J Sbornik. Mathematics %D 1971 %P 529-551 %V 13 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1971_13_4_a2/ %G en %F SM_1971_13_4_a2