Sivak M., Flannagan M.J., Traube E.C., Kojima S. and Aoki M.Low-beam headlamps: Effects of realistic levels of dirt on light outputLighting Res. Technol.29(1) 15-22 (1997)
2.
Cobb J.Roadside survey of vehicle lighting 1989 Research Report 290 ( Crowthorne, Berkshire, UK: Transport and Road Research Laboratory) (1990)
3.
Alferdinck J W A MRequired luminous intensities above horizontal and cut-off sharpness of low-beam car headlamps; a literature survey Report TM-96-C030 (Soesterberg, The Netherlands: TNO Human Factors Research Institute) (1996)
