$Z$--$Z'$ mixing and oblique corrections in an ${\rm SU(3) \times U(1)}$ model
arXiv:hep-ph/9302271 · doi:10.1007/BF01574173
Abstract
A global fit for experiments is included in this revised version.
IFP-460-UNC, TRI-PP-93-11, 20 pages, 2 figures are appended