Alväger, T.; Farley, F. J. M.; Kjellman, J.; Wallin, L. (1964), "Test of the second postulate of special relativity in the GeV region", Physics Letters, 12 (3): 260—262, Bibcode:1964PhL....12..260A, doi:10.1016/0031-9163(64)91095-9.
Alväger, T.; Farley, F. J. M.; Kjellman, J.; Wallin, L. (1964), "Test of the second postulate of special relativity in the GeV region", Physics Letters, 12 (3): 260—262, Bibcode:1964PhL....12..260A, doi:10.1016/0031-9163(64)91095-9.