@incollection{AST_1979__61__73_0,
     author = {Erd\"os, Paul},
     title = {Some unconventional problems in number theory},
     booktitle = {Journ\'ees Arithm\'etiques de Luminy},
     series = {Ast\'erisque},
     pages = {73--82},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {61},
     year = {1979},
     zbl = {0399.10001},
     language = {en},
     url = {http://www.numdam.org/item/AST_1979__61__73_0/}
}