Neutrino masses in the supersymmetric SU(3)C⊗SU(3)L⊗U(1)X model with right-handed neutrinosP.V. Dong, D.T. Huong, M.C. Rodriguez and H.N. LongEur. Phys. J. C, 48 1 (2006) 229-241DOI: https://doi.org/10.1140/epjc/s10052-006-0010-z