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John Bullough. (2017). Factors Affecting Sign Visibility, Conspicuity, and Legibility: Review and Annotated Bibliography. Interdisciplinary Journal of Signage and Wayfinding, 1(2), 2–25.
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Clanton, N., Gibbons, R., Garcia, J., & Barber, M. (2014). Seattle LED Adaptive Lighting Study.
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Riad Saraiji, M. S. O. (2012). Light Pollution Index (LPI): An Integrated Approach to Study Light Pollution with Street Lighting and Façade Lighting. The Journal of the Illuminating Engineering Society, 9(2), 127–145.
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S Fotios, J. U. (2018). Illuminance required to detect a pavement obstacle of critical size. Lighting Research & Technology, 50, 390–404.
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S Fotios, H. F. C. (2015). Lighting for cycling in the UK—A review. Lighting Research & Technology, 49(3), 381–395.
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