By Howson, A. G.
By Weir, Alan J.
By Batchelor, G. K.
By Wenninger, Magnus J.
By Hilbe, Joseph M.
By School Mathematics Project
By Baker, Alan
By Tennison, B. R.
By Bollob¿s, B.
By Evyatar, A.
By Drake, F. R.
By Cramer, Jan Salomon
By Lindley, D. V., Scott, W. F.
By Bolt, Brian
By Bruce, J. W., Giblin, P.
By Temperley, H. N. V.
By Bolt, Brian, Brian Bolt
By Stewart/Tall, Ian Stewart, David Tall
By Lighthill, Sir James
By Saunders, Peter
By George Boolos, Richard C. Jeffrey, Boolos, George, Jeffrey, Richard C.
By Press, William H., Teukolsky, Saul A., Vetterling, William T., Flannery, Brian P.
By Gonshor, Harry
By Hacking, Ian
By David Smart, School Mathematics Project
By Gärdenfors, Peter