1. Alderson, H. E. (1935): cited by Neubauer, O. (1947)
2. Alexander, A.: Arch. Derm. Syph. (Chicago) 129, 5 (1921)
3. Aliferis (1924): cited by Ullmann, K. (1930)
4. Amersbach, J.: Arch. Derm. (Wien) 65, 505 (1952)
5. Anderson, N. P.: Bowen’s precancerous dermatosis and multiple benign superficial epithelioma. Evidence of arsenic as an etiologic agent. Arch. Denn. Syph. (Chicago) 26, 1052 (1932)