Observability at LEP2 hadronic channels of a Z' with small lepton   couplings
  We consider the effects of a number of models with one extra $Z$, with enhanced couplings to quarks, in the final \underline{hadronic} channels at LEP2. We show that, for a number of representative cases, visible effects could be produced even for very low values of the \underline{lepton} couplings, much smaller than the existing LEP1/SLC and the future LEP2 (lepton channel) bounds. 
G. Montagna, F. Piccinini, J. Layssac, F.M. Renard and C. Verzegnassi