The seesaw mechanism at TeV scale in the 3-3-1 model with right-handed neutrinos D. Cogollo, H. Diniz, C. A. de S. Pires and P. S. Rodrigues da Silva Eur. Phys. J. C, 58 3 (2008) 455-461 Published online: 25 October 2008 DOI: 10.1140/epjc/s10052-008-0749-5