Exact Green’s functions for the two-site Hubbard-Holstein Hamiltonian
Mona Berciu
Phys. Rev. B 75, 081101(R) (2007) - Published 5 February, 2007
Conductivity of a quasiperiodic system in two and three dimensions
D. Braak
Phys. Rev. B 75, 081102(R) (2007) - Published 13 February, 2007