@article{PMIHES_1973__42__121_0, author = {Schaeffer, David G.}, title = {An index theorem for systems of difference operators on a half space}, journal = {Publications Math\'ematiques de l'IH\'ES}, pages = {121--127}, publisher = {Institut des Hautes \'Etudes Scientifiques}, volume = {42}, year = {1973}, zbl = {0274.47020}, mrnumber = {47 \#9341}, language = {en}, url = {www.numdam.org/item/PMIHES_1973__42__121_0/} }
Schaeffer, David G. An index theorem for systems of difference operators on a half space. Publications Mathématiques de l'IHÉS, Tome 42 (1973) , pp. 121-127. http://www.numdam.org/item/PMIHES_1973__42__121_0/
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