Toward Development of a Generalized Contact Algorithm for Polyhedral Objects. - Christopher A. Tenaglia; David E. Orin; Robert A. LaFarge; Chris Lewis 001 (ICRA, 1999)

Cooperative Sentry Vehicles and Differential GPS Leapfrog. - John T. Feddema; Chris Lewis 001; Robert A. LaFarge (DARS, 2000)