@incollection{AST_1994__224__1_0,
     author = {AST},
     title = {Index theorem for elliptic pairs - {Pages} pr\'eliminaires},
     booktitle = {Index theorem for elliptic pairs},
     series = {Ast\'erisque},
     pages = {1--4},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {224},
     year = {1994},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1994__224__1_0/}
}