1. Therap. Notes, 64/4, 94 (1967).
2. Halberg, F., Intern. J. Biometeorol., 7/2, 167 (1963).
3. Halberg, F., Good, R. A., and Levine, H., Circulation, 34/5 715 (1966).
4. Barcal, R., Matousek, J., Sova, J., Third Czechoslovakian Congr. Medical Genetics, Plzen (1967);
5. Plzen. Lek. Sborn., suppl. 22, 109 (1968).