By K. Erdmann, Mark J. Wildon
By Fletcher, T. J
By The Math Forum, Jessica Wolk-Stanley
By Howard Anton
By Alfred S. Posamentier, Ingmar Lehmann
By Ian Jacques
By Paul Dickinson, Susan Hough, Frank Eade, Steve Gough, Stella Dudzic
By Mapp, Fiona
By David C. Lay
By Carol Whitehead, David Towers
By Stewart, Ian
By Martin Anthony (London School of Economics and Political Science), Michele Harvey (London School of Economics and Political Science)
By Joseph Gallian
By Gareth A. Jones, David Singerman
By Daniel T. Finkbeiner
By Bruce A. Schumm (Professor of Physics, University of California, Santa Cruz)
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By T. S. Blyth, E. F. Robertson
By Juliusz Brzezinski
By Matej Bresar
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By T.S. Blyth, E.F. Robertson
By Frank Y. Wang (LaGuardia College, NY)
By Unknown, Various
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By K. G. Binmore
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