1. Hansen GA: Undersogelser angaende spedalskhedens arsager. Norsk Mag Leagevidensk 1874, 4:1–88, 1-LIII.
2. Ridley DS, Jopling WH: Classification of leprosy according to immunity: A five-group system. Int J Lep 1966, 34: 255–273.
3. Fine PEM. Leprosy: The epidemiology of a slow bacterium. Lancet 1978, 2: 243–247.
4. Kirchleimer WF, Storrs EE: Attempts to establish the armadillo (Dasypus novemcintus Linn.) as a model for the study of leprosy. I. Report of lepromatid leprosy in experimentally infected armadillo. Int J Lepr 1971, 39: 693–702.
5. Shepard CC: The experimental disease that follows the injection of human leprosy into foot-pads of mice. J Exp Med 1960, 112: 445–454.