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APA Citation
He, Y., Li, Y., Xing, L., Qiu, Z., & Zhang, X. (2021). influence of text luminance, text colour and background luminance of variable-message signs on legibility in urban areas at night. Lighting research & technology, 53, 263–279. http://access.bl.uk/ark:/81055/vdc_100121134951.0x00000f