M. Gell-Mann, 1957, Phys. Rev., 106, 1296, 10.1103/PhysRev.106.1296
J. Schwinger, 1957, Ann. Phys., 2, 407, 10.1016/0003-4916(57)90015-5
G. F. Chew, La Jolla Conference on Strong and Weak Interactions, June, 1961
M. Ikeda, 1959, Progr. Theoret. Phys. (Kyoto), 22, 715, 10.1143/PTP.22.715
Y. Ohnuki, 1960, Proceedings of the 1960 Annual International Conference on High-Energy Physics at Rochester
Y. Yamaguchi, 1959, Progr. Theoret. Phys. (Kyoto) Suppl., 11, 1, 10.1143/PTPS.11.1
J. Wess, 1960, Nuovo cimento, 10, 15
J. Bernstein, 1960, Nuovo cimento, 17, 757, 10.1007/BF02727566
Y. Nambu, 1960, Phys. Rev. Letters, 4, 380, 10.1103/PhysRevLett.4.380
Chou Kuang-Chao, 1961, Soviet Phys.—JETP, 12, 492
M. Goldberger, 1958, Phys. Rev., 110, 1478, 10.1103/PhysRev.110.1478
M. Gell-Mann, 1961, Phys. Rev., 124, 953, 10.1103/PhysRev.124.953
J. J. Sakurai, 1960, Ann. Phys., 11, 1, 10.1016/0003-4916(60)90126-3
R. Hofstadter, 1961, Phys. Rev. Letters, 6, 293, 10.1103/PhysRevLett.6.293
S. Bergia, 1961, Phys. Rev. Letters, 6, 367, 10.1103/PhysRevLett.6.367
M. Gell-Mann, 1960, Proceedings of the 1960 Annual International Conference on High-Energy Physics at Rochester
J. Schwinger, 1959, Phys. Rev. Letters, 3, 296, 10.1103/PhysRevLett.3.296
F. Gursey, 1960, Nuovo cimento, 16, 230, 10.1007/BF02860276
M. Gell-Mann, 1960, Nuovo cimento, 16, 705, 10.1007/BF02859738
E. Fermi, 1949, Phys. Rev., 76, 1739, 10.1103/PhysRev.76.1739
E. Teller, 1956, Proceedings of the Sixth Annual Rochester Conference on High-Energy Nuclear Physics, 1956
J. Schwinger, lectures at Stanford University, summer, 1961
S. Sakata, 1956, Progr. Theoret. Phys. (Kyoto), 16, 686, 10.1143/PTP.16.686
A. Gamba, 1959, Proc. Natl. Acad. Sci. U. S., 45, 881, 10.1073/pnas.45.6.881
L. Okun, 1959, Ann. Rev. Nuclear Sci., 9, 61, 10.1146/annurev.ns.09.120159.000425
R. P. Feynman, 1958, Phys. Rev., 109, 193, 10.1103/PhysRev.109.193
S. S. Gershtein, 1957, Soviet Phys.—JETP, 2, 576
M. Gell-Mann, 1956, Proceedings of the Sixth Annual Rochester Conference on High-Energy Nuclear Physics, 1956
M. Gell-Mann, 1961, Ann. Phys., 15, 437, 10.1016/0003-4916(61)90193-2
S. Weinberg, 1958, Phys. Rev., 112, 1375, 10.1103/PhysRev.112.1375
Y. Ne'eman, 1961, Nuclear Phys., 26, 222, 10.1016/0029-5582(61)90134-1
A. Salam, 1961, Nuovo cimento, 20, 419, 10.1007/BF02781760
B. C. Maglić, 1961, Phys. Rev. Letters, 7, 178, 10.1103/PhysRevLett.7.178
M. Gell-Mann, 1961, Phys. Rev., 123, 1065, 10.1103/PhysRev.123.1065
L. Castillejo, 1956, Phys. Rev., 101, 453, 10.1103/PhysRev.101.453
