1. Beer. Verhandl. der Wiener derm. Gesellsch. Ref. Arch. f. Derm. u. Syph. Bd. XXIV. p. 835.
2. Block. Atrophia cutis idiopathica. Dreitausend Fälle von Hautkrankheiten.
3. Bruhns. Berl. derm. Gesellsch. 1./III. 1894.
4. Derselbe. Berliner derm. Gesellsch. Ref. Arch. f. Derm. u. Syph. Bd. LII. pag. 406.
5. Derselbe. Berliner dermatol. Gesellsch. 1900. 13./XI.