The doubly heavy baryons in the nonperturbative QCD approach
  We present some piloting calculations of the masses of the doubly heavy baryons in the framework of the simple approximation within the nonperturbative string approach. The simple analytical results for dynamical masses of heavy and light quarks and eigenvalues of the effective QCD Hamiltonian are presented. 
I.M.Narodetskii and M.A.Trusov