1. O. Antipin, M. Mojaza and F. Sannino, Natural Conformal Extensions of the Standard Model, arXiv:1310.0957 [ INSPIRE ].
2. S. Weinberg, Implications of Dynamical Symmetry Breaking, Phys. Rev. D 13 (1976) 974 [ INSPIRE ].
3. L. Susskind, Dynamics of Spontaneous Symmetry Breaking in the Weinberg-Salam Theory, Phys. Rev. D 20 (1979) 2619 [ INSPIRE ].
4. D.B. Kaplan and H. Georgi, SU(2) × U(1) Breaking by Vacuum Misalignment, Phys. Lett. B 136 (1984) 183 [ INSPIRE ].
5. D.B. Kaplan, H. Georgi and S. Dimopoulos, Composite Higgs Scalars, Phys. Lett. B 136 (1984) 187 [ INSPIRE ].