%A Graham M. Birtwistle
%A Ole-Johan Dahl
%A Bjorn Myhrhaug
%A Kristen Nygaard
%T Simula begin
%I Petrocelli/Charter
%C New York
%D 1973
%P 391

%A Harry Katzan,\ Jr.
%T The standard data encryption algorithm
%I Petrocelli/Charter
%C New York
%D 1977
%P 134