text: For simplicity and also for comparisons with earlier 
  studies, for BCSI, EB, and MFLI models we assumed 
  that the gap is just a constant along the FS. For CB 
  model, we used a d−wave gap and included into consid- 
  eration the fact that, if a CB is a spin ﬂuctuation, its 
  propagator develops a resonance when the pairing gap is 
  d−wave. 
  (10) 