1. Ackroyd, J. F., and A. Rook: Drug reactions. In: Clinical aspects of immunology (P. G. H. GELL and R. R. A. Coombs, eds.), p. 448—496. Oxford: Blackwel 1963.
2. Asherson, G. L., and S. H. Stone: Selective and specific inhibition of 24-hour skin reactions in the guinea-pig. I. Immune deviation: description of the phenomenon and the effect of splenectomy. Immunology 9, 205—217 (1965).
3. Axelrod, A. E., A. C. Trakatellis, and K. Hofmann: Antigenicity of synthetic polypeptides with known amino acid sequence. Nature (Lond.) 197, 146—148 (1963)
4. Baer, H., and S. D. Chaparas: Delayed skin reactivity to carbohydrate and protein fractions of Mycobacterium bovis (BCG) culture filtrate in the absence and presence of serum antibody. J. Immunol. 96, 353—357 (1966).
5. ———, R. C. Watkins, and R.T. Bowser: Delayed contact sensitivity to catechols and resorcinols. The relationship of structure and immunization procedure to sensitizing capacity. Immunochemistry 3, 479—485 (1966).