1. Inverse scattering theory for discrete Schrödinger operators on the hexagonal lattice;Ando;Ann. Henri Poincaré,2013
2. A. Badanin, E. Korotyaev, N. Saburova, Laplacians on Z2-periodic discrete graphs, preprint, 2013.
3. Structure of Metals: Crystallographic Methods, Principles and Data;Barrett,1980
4. Introduction to Quantum Graphs;Berkolaiko,2012
5. On the spectral properties of discrete Schrödinger operators: the multi-dimensional case;Boutet de Monvel;Rev. Math. Phys.,1999