Repositorio Institucional de la Universidad de Oviedo

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We thank the Spanish MINECO, grant CTQ2015-65790-P, the FICyT, grant GRUPIN14-049, and the European Union FEDER funds. J.M.G.V. is also grateful to CONACyT/Mexico for funding (grant 381483). T.R.R. gratefully acknowledges financial support from CONACyT (grant 253776) and DGAPA/UNAM (project IN209715) as well as computer time from DGTIC/UNAM (grant LANCAD/UNAM/DGTIC/250).