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Vaaja, M. T., Kurkela, M., Maksimainen, M., Virtanen, J., Kukko, A., Lehtola, V. V., Hyyppä, J., & Hyyppä, H. (2018). MOBILE MAPPING OF NIGHT-TIME ROAD ENVIRONMENT LIGHTING CONDITIONS. The Photogrammetric Journal of Finland, 26(1).
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Lazar, M. (2010). Shedding Light on the Global Distribution of Economic Activity. Togeogj, 3(1), 147–160.
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Garstang, R. H. (2007). Brightness of clouds at night over a city. The Observatory, 127, 1–13.
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Crawford, D. L. (1997). Photometry: teminology and units in the lighting and astronomical sciences. The Observatory, 117, 14–18.
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Teare, S. W. (2000). The night sky brightness at Mount Wilson Observatory. The Observatory, 120, 313–317.
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