1. Moser, J., Minimal solutions of variational problems on a torus, AIHP Analyse Nonlinéaire, 3, (1986), 229–272.
2. Bangert, V., On minimal laminations of the torus, AIHP Analyse Nonlinéaire, 6, (1989), 95–138.
3. Aubry, S. and P. Y. LeDaeron, The discrete Frenkel-Kantorova model and its extensions I-Exact results for the ground states, Physica, 8D, (1983), 381–422.
4. Mather, J. N., Existence of quasi-periodic orbits for twist homeomorphisms of the annulus, Topology, 21, (1982), 457–467.
5. Rabinowitz, P. H. and Stredulinsky E., On some results of Moser and of Bangert, AIHP, Analyse Nonlineáire, 21, (2004), 673–688.