By Juliusz Brzezinski
By Jeremy Gray
By Steven Holzner
By S. G. Hoggar (University of Glasgow)
By K. G. Binmore
By George B. Thomas, Ross L. Finney
By H. Takayasu
By David Clark, John Eric Jackson
By Michael Frame, Amelia Urry
By Stefan Hildebrandt, Anthony Tromba
By Kenneth Falconer (Professor of Pure Mathematics, University of St Andrews)
By Gareth A. Jones, David Singerman
By Bernard F. Schutz (Director)
By Sherman K. Stein, Anthony Barcellos
By Mauro C. Beltrametti, Ettore Carletti, Dionisio Gallarati, Francis Sullivan
By Euclid, Thomas L. Heath, Dana Densmore
By Alfred S. Posamentier, Ingmar Lehmann
By The Math Forum
By Livio, Mario
By Kimmel, Ron, Bronstein, M., A.
By Mary Jane Sterling
By Mary Jane Sterling (Bradley University, Peoria, IL)
By Wendy Arnone
By Istvan Hargittai, Magdolna Hargittai
By J. Jost (Max Planck Institute for Mathematics in Science, Leipzig, Germany)
By Ron Larson (The Pennsylvania State University, The Behrend College)
By Paul Strathern
By MJ Sterling
By Alexander Zawaira (Senior Scientist, Kapa Biosystems, Cape Town, South Africa), Gavin Hitchcock (University of Zimbabwe)