@incollection{AST_1973__5__1_0,
     author = {AST},
     title = {Pages pr\'eliminaires},
     booktitle = {Pseudofunctions and Helson Sets},
     series = {Ast\'erisque},
     pages = {1--2},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {5},
     year = {1973},
     language = {en},
     url = {http://www.numdam.org/item/AST_1973__5__1_0/}
}