1. Adam, H.: Peritrophic membranes in the intestine of the hagfish (Myxine glutinosa). In: Phylogeny of immunity (ed. by R. T. Smith, P. A. Miescher and R. A. Good), p. 147. Florida: University Press 1965
2. Ambrosius, H., Lehmann, R.: Beiträge zur Immunobiologie poikilothermer Wirbeltiere. III. Der Einfluß von Adjuvanten auf die Antikörper-Production. Acta. biol. med. German. 14, 830–944 (1965).
3. Aeser, C. S.: Gjeddepsten in 1923. Norsk Veterinaertidsskr. (1925) (Cit. by Pliska).
4. Avetikyan, B. G.: Immunological reaction in fishes. Akad. Nauk SSSR, Ikht, Kom. 8, 387–392 (1958).
5. Avrameas, S., Ternynck, T.: Biologically active water-insoluble protein polymers. I. Their use for isolation of antigens and antibodies. J. biol. Chem. 242, 1651–1659 (1967).