1. Carrié: Arch. Dermat. (D.) 173, 605 (1936).
2. Carrié u. Ottofrickenstein: Arch. Gewerbepath. 11, 345 (1942).
3. Linser: Arch. klin. Med. 80, 201 (1904).
4. Leubuscher: Verh. Kongr. inn. Med. 1899, 457.
5. Kuznitzky: Arch. Derm. (D.) 114, 691 (1913).