1. “Die Geschwülste der Hautdrüsen.” RICKER and SCHWALB. Berlin. 1914. Full references and plates.
2. DUBREUILH and AUCHÉ. Transactions of International Congress of Dermatology, London, 1898, p. 818.
3. “Rodent Ulcer.”;BOWLBY;Path. Trans.,1894
4. “Multiple Rodent Ulcer.”;ADAMSON;Lancet,1908