M. A. Braun:Žurn. Ėksp. Teor. Fiz.,37, 816 (1959).
G. Wataghin:Lectures in Theoretical Physics at the University of Colorado, Boulder, 1958 (New York, 1959), p. 219.
G. Wataghin:Bras. Acad. Sciences, Symposium on Cosmic Ray, 194I (Rio de Janeiro, Acad. Bras. de Ciencias, 1943);
Phys. Rev.,74, 975 (1948);
Lectures at the 1958 Summer Theor. Phys. (New York, 1959).
Nuovo Cimento,5, 689 (1957).
G. Wataghin:Nuovo Cimento,5, 689 (1957).
H. P. Durr, W. Heisenberg, H. Mitter, S. Schlieder andK. Yamazaki:Zeits. f. Naturfor.,14, 441 (1959).