1. Beer, W. E., Wilson, Jones, E.: Granuloma annulare following tuberculin Heaf tests. Trans. St. John's Hosp. Derm. Soc.52, 68 (1966)
2. Calvin R. B., Dvorak, H. F.: Role of the clotting system in cell-mediated hypersensitivity. II. Kinetics of fibrinogen/ fibrin accumulation and vascular permeability changes in tuberculin and cutaneous basophil hypersensitivity reactions. J. Immun.114, 377?387 (1975)
3. Carrington, S. G., Winkelmann, R. K.: Electron microscopy of histiocytic diseases of the skin. Acta derm.-venereol. (Stockh.)52, 161?178 (1972)
4. Charles, C. R., Cooper, P. H., Helwig, E. B.: A study of granuloma annulare at the fine structural level (abstract). Arch. Derm. (Chic.)111, 1665 (1975)
5. Charles, C. R., Johnson, B. L., Damm, S. R.: Granuloma annulare (review). Int. J. Derm.15, 655?665 (1976)