1. N.N.Bogolyubov, On some statistical methods in mathematical physics. Acad. Nauk Ukrain. SSR, L'vov, 1945, MR 8-37.
2. S.Poisson, Seconde memoire sur la theorie du magnetisme, Mèm. De l'Acad. de France 1882, 5.
3. J.C. Maxwell, Electricity and Magnetism, vol.1, Clarendon Press, Oxford, 1892.
4. W.R.Rayleigh, On the influence of obstacles arranged in rectangular order upon the properties of a medium. Phys.Mag.34 (1892), 241, 481.
5. A.Bensoussan, J.L.Lions, G.Papanicolaou, Asymptotic analysis for periodic structures North Holland, Amsterdam, 1978.