Problem 11098. - Christopher J. Hillar; Darren L. Rhea (Am. Math. Mon., 2004)

A result about the density of iterated line intersections in the plane. - Christopher J. Hillar; Darren L. Rhea (Comput. Geom., 2006)

An Oldie: 11098. - Christopher J. Hillar; Darren L. Rhea; Godfrey L. Isaacs (Am. Math. Mon., 2006)

Automorphisms of Finite Abelian Groups. - Christopher J. Hillar; Darren L. Rhea (Am. Math. Mon., 2007)