@incollection{AST_1985__131__43_0,
     author = {Atiyah, Michael F.},
     title = {Circular symmetry and stationary-phase approximation},
     booktitle = {Colloque en l'honneur de Laurent Schwartz - Volume 1},
     series = {Ast\'erisque},
     pages = {43--59},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {131},
     year = {1985},
     mrnumber = {816738},
     zbl = {0578.58039},
     language = {en},
     url = {http://www.numdam.org/item/AST_1985__131__43_0/}
}