@incollection{AST_1973__5__231_0,
     author = {K\"orner, Thomas W.},
     title = {A pseudofunction on a {Helson} set. {II.}},
     booktitle = {Pseudofunctions and Helson Sets},
     series = {Ast\'erisque},
     pages = {231--239},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {5},
     year = {1973},
     zbl = {0281.43005},
     mrnumber = {404976},
     language = {en},
     url = {http://www.numdam.org/item/AST_1973__5__231_0/}
}