@incollection{AST_1985__S131__165_0,
     author = {Kac, V. G. and Peterson, D. H.},
     title = {Defining relations of certain infinite dimensional groups},
     booktitle = {\'Elie Cartan et les math\'ematiques d'aujourd'hui - Lyon, 25-29 juin 1984},
     series = {Ast\'erisque},
     pages = {165--208},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {S131},
     year = {1985},
     mrnumber = {837201},
     zbl = {0625.22014},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1985__S131__165_0/}
}