1. R.E. Marshak, Riazuddin, C.P. Ryan, Theory of Weak Interaction of Elementary Particles (Interscience, New York, 1969)
2. H. Yukawa, Proc. Phys. Mater. Soc. Japan 17, 48 (1935)
3. C. Möller, Physik. Z. Sowjetunion 11, 9 (1937)
4. J.E. Rothberg, E.W. Anderson, E.J. Bleser, L.M. Lederman, S.L. Meyer, J.L. Rosen, I.-T. Wang, Phys. Rev. 132, 2664 (1963)
5. A.A. Quaranta, A. Bertin, G. Matone, F. Palmonari, G. Torelli, P. Dalpiaz, A. Placci, E. Zavattini, Phys. Rev. 177, 2118 (1969)