Bøggild, H., Burr, H., Tüchsen, F., & Jeppesen, H. J. (2001). Work Environment of Danish Shift and Day Workers. Scandinavian Journal of Work, Environment & Health, 27(2), 97-105. https://www.airitilibrary.com/Article/Detail?DocID=03553140-200103-201011110167-201011110167-97-105