1. John Johnson, “ Analysis of Image Forming Systems”
2. Erik Rosén, Jan-Erik Källhammer, Dick Eriksson, Matthias Nentwich, Rikard Fredriksson, Kip Smith, “PEDESTRIAN INJURY MITIGATION BY AUTONOMOUS BRAKING”, Autoliv Research, Sweden, Paper Number 09–0132
3. Comparison of laser beam propagation at 785 nm and 1550 nm in fog and haze for optical wireless communications