1. Aoki, K, Shimogote, M. and Saito, T.: Jap. J. Allergol.
22, 401 (1973).
2. Aoyama, H.: Jap. J. Derm., Ser. B.
81, 266 (1971).
3. Baart de la Faille, H., Rottier, P. B. and Baart de la Faille-Kuyper, E. H.: Brit. J. Derm. 92, 101 (1975).
4. Baer, R. L.: Allergic Dermatoses due to Physical Agents. University Press, New York 1956, p. 5.
5. Baer, R. L. and Harber, L. C.: Arch. Derm. 83, 7 (1961).