Isgur - Wise Functions for Confined Light Quarks in a Colour Electric   Potential
  We explore the influence on the Isgur-Wise function of the colour electric potential between heavy and light quarks in mesons. It is shown that in bag models, its inclusion tends to restore light quark flavour symmetry relative to the MIT bag predictions, and that relative to this model it flattens the Isgur-Wise function. Results compare very well with observations. 
H. Hogaasen and M. Sadzikowski