Doubly charged Higgs from e–γ scattering in the 3-3-1 Model J.E. Cieza Montalvo, G.H. Ramírez Ulloa and M.D. Tonasse Eur. Phys. J. C, 72 11 (2012) 2210 Published online: 08 November 2012 DOI: 10.1140/epjc/s10052-012-2210-z