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APA Citation
Cotrim, T., Carvalhais, J., Neto, C., Teles, J., Noriega, P., & Rebelo, F. (2016). determinants of sleepiness at work among railway control workers. Applied ergonomics, 58, 293–300. http://access.bl.uk/ark:/81055/vdc_100035844306.0x000060