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Novozhilov, Yu. V.
The method of functionals in the quantum theory of fields / by Yu. V. Novozhilov and A. V. Tulub ; with an introductory article, Equations with variational derivatives in problems of statistical physics and of quantum field theory, by N. N. Bogolyubov.
— New York : Gordon and Breach, c1961. viii, 79 p. ; 23 cm. — (Russian tracts on advanced mathematics and physics ; v. 5)
Originally published as: Metod functsionalov v kvantovoi teorii polya, Uspekhi Fizicheskikh Nauk LXI, 1, 53-102 (1957), [and] Uravneniya s variatsionnymi proizvodnumi v problemakh statisticheskoi fiziki i kvantivoi teorii polya, Vestnik Moskovskogo Universiteta 10, 115-124 (1955).
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