Alonso, R., Gavela, M., Merlo, L., Rigolin, S., & Yepes, J. (2013). The Effective Chiral Lagrangian for a Light Dynamical "Higgs Particle". Physics Letters B, B722, 330-335. https://doi.org/10.1016/j.physletb.2013.04.037%2C+10.1016/j.physletb.2013.09.028