1. I. Ya. Aref'eva, ?A non-Abelian Stokes formula,? Teor. Mat. Fiz.,43, No. 1, 111?116 (1980).
2. Yu. M. Zinov'ev, ?Duality in Abelian gauge theories on a lattice,? Teor. Mat. Fiz.,43, No. 3, 309?322 (1980).
3. A. A. Kirillov, Elements of the Theory of Representations, Springer-Verlag, Berlin-Heidelberg-New York (1976).
4. V. A. Malyshev, ?Perturbations in Gibbs random fields,? in: Multicomponent Random Systems [in Russian], Nauka, Moscow (1978), pp. 258?276.
5. V. A. Malyshev, ?Soliton sectors in lattice models with continuous time,? Funkts. Anal. Prilozhen.,13, No. 1, 31?41 (1979).