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\bibitem{Botella_etal2016} Botella, F. J., Branco, G. C., Rebelo, M. N., \& Silva-Marcos, J. I. (2016). What if the masses of the first two quark families are not generated by the standard model Higgs boson? \textit{Phys. Rev. D}, \textit{94}(11), 115031--6pp.

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