Training image classifiers with similarity metrics, linear programming, and minimal supervision. - Karl S. Ni; Ethan Phelps; Katherine L. Bouman; Nadya T. Bliss (ACSCC, 2012)

Blind Compensation of Angle Jitter for Satellite-Based Ground-Imaging Lidar. - Ethan Phelps; Charles A. Primmerman (IEEE Trans. Geosci. Remote. Sens., 2020)