1. Pachyonychia congenita. Keratosis disseminata circumscripta (follicularis). Tylomata. Leukokeratosis linguae;Jadassohn,1906
2. Pachyonychia congenita;Feinstein;J Am Acad Dermatol,1988
3. Congenital pachyonychia (Riehl type);Kumer;Wien Klin Wochenschr,1935
4. The pachyonychia congenita syndrome;Schonfeld;Acta Derm Venereol (Stockh),1980
5. Pachyonychia congenita;Sivasundram;Int J Dermatol,1985