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3. R. Jost, The General Theory of Quantized Fields, AMS, Providence, R.I. (1965).
4. V. S. Vladimirov, Methods of the Theory of Functions of Many Complex Variables, M.I.T. Press, Cambr., Mass. (1966).
5. Twistors and Gauge Fields (Collection of Papers by R. Penrose and others; Russian translations), Mir, Moscow (1983).