Duane W. DeTemple "Carlyle Circles and the Lemoine Simplicity of Polygon Constructions" in The American Mathematical Monthly, Volume 98, Issuc 1 (Feb. 1991), 97–108."4. Construction of the Regular Heptadecagon (17-gon)" pp. 101–104, p.103, web.archive document, selected on 28 January 2017