1. L. Colli andU. Facchini:Nuovo Cimento,12, 150 (1954).
2. L. Colli, U. Facchini, G. Guidotti, R. Dugnani-Lonati, M. Orsenigo andO. Sommariva:Experientia,11, 479 (1955).
3. A. A. Gurwitsch:Experientia,44, 545 (1988).
4. B. Ruth:Experimental investigations on ultraweak photon emission, inElectromagnetic Bio-Information, edited byF. A. Popp (Urban & Schwarzenberg, Munchen, 1988), p. 128.
5. J. Slawinski andD. Slawinska: inChemi and Bioluminescence, edited byJ. G. Burr (Marcel Dekker Inc., New York, N. Y., 1958), p. 95.