Analytical solution of electronic transport through a benzene molecule   using lattice Green's functions
  Using a Green's function formalism we derive analytical expressions for the electronic transmittance through a benzene ring. To motivate the approach we first solve the resonant level system and then extend the method to the benzene case. These results can be used to validate numerical methods. 
E. J. C. Dias and N. M. R. Peres
cond-mat.mes-hall quant-ph