Search for D0 - D0_bar Mixing in Semileptonic Decay Modes
  We report the result of a search for D0 - D0_bar mixing in the data from hadroproduction experiment E791 at Fermilab. We use the D* tag and semileptonic decay vertices of D0 to look for wrong-sign decays with mixing time dependence. 
E. M. Aitala, et al, E791 Collaboration