1. Ada, G.L.: Antigen binding cells in tolerance and immunity. Transplant. Rev. 5, 105–129 (1970)
2. Alkan, S.S., Williams, E.B., Nitecki, D.E., Goodman, J.W.: Antigen recognition and the immune response: Humoral and cellular immune responses to small mono-and bifunctional antigens. J. Exp. Med. 135, 1228–1246 (1972)
3. Allison, A.C.: Interactions of antibodies and effector cells in immunity against tumours. Ann. Inst. Pasteur (Paris) 122, 619–631 (1972)
4. Alter, B.J., Bach, F.H.: Role of H-2 lymphocyte-defined and serologically-defined components in the generation of cytotoxic lymphocytes. J. Exp. Med. 140, 1410–1415 (1974)
5. Altman, L.C., Chassy, B., Mackler, B.F.: Physicochemical characterization of chemotactic lymphokines produced by human T and B lymphocytes. J. Immunol. 115, 18–21 (1975)