(3 vols.): ISBN 0-486-60088-2 (vol. 1), ISBN 0-486-60089-0 (vol. 2), ISBN 0-486-60090-4 (vol. 3). Heath's authoritative translation of Euclid's Elements plus his extensive historical research and detailed commentary throughout the text.
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Meisters, G. H. (1975), Polygons have ears, The American Mathematical Monthly, 82: 648—651, doi:10.2307/2319703, MR0367792.