The Commandant's Corollary. - Charles W. Groetsch (Am. Math. Mon., 2000)

Inverse Scale Space Theory for Inverse Problems. - Otmar Scherzer; Charles W. Groetsch (Scale-Space, 2001)

Dykstra's Algorithm and a Representation of the Moore-Penrose Inverse. - Charles W. Groetsch (J. Approx. Theory, 2002)

Timing Is Everything: The French Connection. - Charles W. Groetsch (Am. Math. Mon., 2003)

Numerical approximation of solutions of a nonlinear inverse problem arising in olfaction experimentation. - Donald A. French; Richard J. Flannery; Charles W. Groetsch; Willam B. Krantz; Steven J. Kleene (Math. Comput. Model., 2006)

Vertical Projection in a Resisting Medium: Reflections on Observations of Mersenne. - Charles W. Groetsch; S. A. Yost (Am. Math. Mon., 2014)

Linear Inverse Problems. - Charles W. Groetsch (Handbook of Mathematical Methods in Imaging, 2015)