%0 Journal Article %T New fermions and a vector-like third generation in $SU(3)_c\otimes SU(3)_L\otimes U(1)_N$ models %A V. Pleitez %J Physics %D 1994 %I arXiv %R 10.1103/PhysRevD.53.514 %X We study two 3-3-1 models with i) five (four) charge 2/3 ($-1/3$) quarks and, ii) four (five) charge 2/3 ($-1/3$) quarks and a vector-like third generation. Possibilities beyond these models are also briefly considered. %U http://arxiv.org/abs/hep-ph/9412304v1