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Lyn 15: * [[Omtrek, oppervlakte en volume]] == Bronne == * {{citation\|first=Abraham Adrian\|last=Albert\|title=Solid Analytic Geometry\|year=2016\|orig-year=1949\|publisher=Dover\|isbn=978-0-486-81026-3}}. * {{cite book\|first=William\|last=Dunham\|pages=[https://archive.org/details/mathematicaluniv00dunh/page/n34 28], 226\|title=The Mathematical Universe: An Alphabetical Journey Through the Great Proofs, Problems and Personalities\|url=https://archive.org/details/mathematicaluniv00dunh\|url-access=limited\|journal=Wiley\|location=New York\|isbn=978-0-471-17661-9\|year=1997\|bibcode=1994muaa.book.....D}} * {{citation\|first1=Erwin\|last1=Kreyszig\|year=1972\|isbn=978-0-471-50728-4\|title=Advanced Engineering Mathematics\|edition=3rd\|publisher=John Wiley & Sons~~\|Wiley]]~~\|location=New York\|url-access=registration\|url=https://archive.org/details/advancedengineer00krey}}. * {{citation\|first=H.\|last=Steinhaus\|title=Mathematical Snapshots\|year=1969\|publisher=Oxford University Press\|edition=Third American}}. ~~{{Saadjie}}~~ {{Normdata}}

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