- Regular Polygons: Applied New Theory of Trisection to Construct a Regular Heptagon for Centuries in the History of Mathematics by Fen Chen, September, 2001
- The Trisectors by Underwood Dudley, December, 1994
- The trisection of angles by Anthony G. Rubino,
- A Budget of Trisections by Underwood Dudley, November, 1987
- Regular Polygons: Applied New Theory of Trisection to Construct a Regular Heptagon for Centuries in the History of Mathematics by Fen Chen, September, 2001
- The Trisectors by Underwood Dudley, December, 1994
- The trisection of angles by Anthony G. Rubino,
- A Budget of Trisections by Underwood Dudley, November, 1987
|