1. Cañizares O: Leprosy, in Clinical Tropical Dermatology. Edited by O Cañizares. London, Blackwell, 1975, pp 109–133
2. Ridley DS, Jopling WH: Classification of leprosy according to immunity. Int J Leprosy 34: 255–273, 1966
3. Henderson JM: The depigmented patch in leprosy: a clinical and pathological study. Indian J Med Res 17:33–39, 1929–1930
4. Cochrane RG: Leprosy in Theory and Practice. Bristol, John Wright and Sons, 1964, pp 251–279
5. Ishibashi Y: Histopathological studies on the skin lesions in leprosy with special reference to the histological changes of pigmentation. Jpn J Dermatol [B] 74: 44–60, 1964