Alsins, J., Claesson, S., Fischer, T., & Juhlin, L. (1975). Development of high intensity narrow-band lamps and studies of the irradiation effect on human skin. Irradiation with high intensity lamps. Acta Dermato-Venereologica, 55(4), 261–271. https://doi.org/10.2340/000155555261271