Rising Bosonic Electroweak Virtual Effects at High Energy e+e- Colliders
  The virtual massive gauge boson effects on several observables in the process of charged fermion pairs production at $e^+e^-$ colliders are computed up to the TeV energy range in the Standard Model, working in the ``$Z$-peak subtracted'' representation. It is shown that these effects increase regularly with energy, approaching the typical ten percent relative size. A careful numerical evaluation is proposed, where the conditions dictated by gauge invariance are consistently implemented. 
M. Beccaria, G. Montagna, F. Piccinini, F.M. Renard and C. Verzegnassi