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* {{cite web | first=Ulf |last=Persson |title=Projective Geometry at Chalmers | website=Chalmers | url=http://www.math.chalmers.se/~ulfp/Teaching/geometri.pdf |year=1989| ref={{sfnref | Projective Geometry at Chalmers}} | access-date=2018-12-30}}
* {{cite book | last=Pottmann | first=Helmut | last2=Asperl | first2=Andreas | last3=Hofer | first3=Michael | last4=Kilian | first4=Axel | last5=Bentley | first5=Daril | title=Architectural geometry | publisher=Bentley Institute Press | year=2007 | isbn=1-934493-04-X | oclc=180177477 | ref=harv}}
* {{cite book | last=Toomer | first=G.J. | title=Diocles on burning mirrors: the Arabic translation of the lost Greek original | publisher=Springer-Verlag | series=Sources in the history of mathematics and physical sciences | year=1976 | isbn=978-3-540-07478-6 | url=https://books.google.com/books?id=ENvuAAAAMAAJ | ref=harv | access-date=2019-01-12}}
* {{cite journal | last=West | first=William Kyer | title=Problems in the Cultural History of the Ellipse | journal=Technology and Culture | publisher=JSTOR | volume=19 | issue=4 | year=1978 | issn=0040-165X | doi=10.2307/3103766 | page=709 | ref=harv}}
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