1. A peculiar pruriginous dermatosis with gross reticular pigmentation;Nagashima;Jap. J. Dermatol., Series B,1971
2. Prurigo pigmentosa;Take;Nishinihon J. Derm.,1976
3. Obermiller: Über Lichen ruber planus cum pigmentatione (Lichen pigmentosus);Arch. Derm. Syph.,1923
4. Pierini , L.E. Borda , J.M. Prurigo melanotica Hautarzt 104 107 1960
5. Pigmented contact dermatitis;Osmundsen;Br. J. Dermatol.,1970