1. Y.ABE, S.KATSURA (1976): Phase transition and distribution of zeros of the partition functions for an antiferomagnetic Ising model and for a hard core lattice gas. J.Phys.Soc. Japan, Vol. 40,642
2. A.V.AHO, J.E.HOPCROFT, J.D.ULLMANN (1974): The design and analysis of computer algorithms. Addison Wesley
3. F.BARAHONA (1980): Application de l’optimisation combinatoire à certains problèmes de verres de spins: complexité et simulation. Thèse Docteur Ingénieur Grenoble
4. H.BOERNER (1970): Representations of groups with special considerations for the needs of modern physics. North Holland Publishing Company
5. V.V.BRYSKIN, A.Y.GOLTSEV, E.E.KUDINOV (1980): Some exact results for the 2D Ising model with regular disposition of frustated squares. J. Phys. C: Solid State Phys., 13