@incollection{AST_1973__2-3__342_0,
     author = {Vishik, M. I.},
     title = {Les op\'erateurs diff\'erentiels et pseudo-diff\'erentiels \`a une infinit\'e de variables, les probl\`emes elliptiques et paraboliques},
     booktitle = {Colloque International C.N.R.S. sur les \'equations aux d\'eriv\'ees partielles lin\'eaires},
     series = {Ast\'erisque},
     pages = {342--362},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {2-3},
     year = {1973},
     mrnumber = {477526},
     zbl = {0285.35061},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1973__2-3__342_0/}
}