1. Vaerman, J. P. (1981) Single radial immunodiffusion, in Methods in Enzymology, vol. 73 (Langone, J. J. and Van Vunakis, H., eds.), Academic, New York, pp. 291–305.
2. Roitt, I. (1994) Essential Immunology, 8th ed., Blackwell Scientific, Oxford, UK, pp. 114,115.