Equilateral Triangles and Triangles. - Richard Jerrard; John E. Wetzel (Am. Math. Mon., 2002)

Prince Rupert's Rectangles. - Richard Jerrard; John E. Wetzel (Am. Math. Mon., 2004)

Problem 11291. - Richard Jerrard; John E. Wetzel (Am. Math. Mon., 2007)

A Solid with the Rupert Property: 11291. - Richard Jerrard; John E. Wetzel; Mark D. Meyerson (Am. Math. Mon., 2009)