Metzner, W. Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;
Kollar, M., Eckstein, M., Byczuk, K., Blümer, N., van Dongen, P., de Cuba, M. H. R., et al. (2005). Green functions for nearest- and next-nearest-neighbor hopping on the Bethe lattice. Annalen der Physik, 14(9-10), 642-657.