1. Bachern, A., 1929, The ultraviolet transparency of the various layers of human skin, Am. J. Physiol
91:58–64.
2. Bachern, A., 1955, Time factors of erythema and pigmentation, produced by ultraviolet rays of different wavelengths, J. Invest Dermatol
25:215–218.
3. Berger, D., Urbach, F., and Davies, R. E., 1968, The action spectrum of erythema induced by ultraviolet radiation, preliminary report, “Proceedings, XIII, Congressus Internationalis Dermatologiae — München, 1967,” pp. 1112–1117, Springer-Verlag, New York.
4. Blum, H. F., and Terus, W. S., 1946, Inhibition of erythema of sunburn by large doses of ultraviolet radiation, and The erythemal threshold for sunburn, Am. J. Physiol
146:97–106, 107–117.
5. Bode, H. G., and Witte, E., 1947, Uber den Zusammenhang zwischen absorierter Strahlenergie und biologischen Effeckt bei Bestrahlung mit Licht verschiedener Wellenlangen, Strahlentherapie
76:627–663.