David Singmaster: differenze tra le versioni

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=== Opere di riferimento ===
* David Singmaster, ''Chronology of Recreational Mathematics'', 1996.
* David Singmaster, ''Chronology of Computing'', University of Applied Sciences di [[Darmstadt]], 2000 ([https://web.archive.org/web/20170223043445/https://www.fbi.h-da.de/fileadmin/vmi/chronologie/ disponibile online]).
* David Singmaster, ''Sources in Recreational Mathematics: An Annotated Bibliography'', South Bank University, 2004 ([http://www.puzzlemuseum.com/singma/singma-index.htm disponibile online]).
* David Singmaster, ''Mathematical Gazetteer of the British Isles'', The British Society for the History of Mathematics, 2012 ([https://web.archive.org/web/20120514145358/http://www.dcs.warwick.ac.uk/bshm/gazetteer.html disponibile online]).