Application of perturbation analysis to traffic light signal timing. - Michael C. Fu 001; William C. Howell (CDC, 2003)

Simulation Optimization of Traffic Light Signal Timings via Perturbation Analysis. - William C. Howell (2006)

Human Factors in the 1990s: Sealing Transition Cracks. - William C. Howell (Hum. Factors, 2008)