1. Ehrlich, P. and Morgenroth, J. (1957) in The Collected Papers of Paul Ehrlich, Third Communication (Vol. 2) (Himmelweit, F., ed.), pp. 205–212, Pergamon Press
2. Ehrlich, P. and Morgenroth, J. (1957) in The Collected Papers of Paul Ehrlich, Fifth Communication (Vol. 2) (Himmelweit, F., ed.), pp. 246–255, Pergamon Press
3. Landsteiner, K. (1962) in The Specificity of Serological Reactions (revised edn) (Chase, M.W., ed.), p. 330, Dover Publications