Decay constants of heavy-light mesons in the relativistic quark model
  The decay constants of pseudoscalar and vector heavy-light mesons are calculated in the framework of the relativistic quark model with the completely relativistic treatment of the light quark. It is argued that relativistic effects play a significant role. Good agreement of the model predictions with recent lattice and QCD sum rule calculations as well as available experimental data is found. 
D. Ebert, R. N. Faustov, V. O. Galkin