1. Alexander A., Med. Klin., 18, (2), 1550, (1922); ib. 23, 275, (1927).
2. Amberg S., Journ. Exper. Med., 12, 435, (1910).
3. Ambrosoli G. A., Giorn. It. Mal. Vener. Pelle, 62, 233, (1921); ib. 64, 147, (1923); Giorn. It. Derm. Sif., 67, 1552, (1926); ib. 68, 820, (1927); Policlinioo Sez. Pratica, 34, 487, (1927).
4. Arnol. W., Arch. Derm. u. Syph., 136, 125, (1921).
5. Artom M., Giorn. It. Derm. Sif., 74, 563, (1933).