@book{15422,
	author = {Balian, Roger and Zinn-Justin, Jean  and Zinn-Justin, Jean ; jt. ed.},
	title = {Methods in field theory},
	publisher = {North-Holland},
	year = {1981},
	series = {Les Houches, ecole d'ete de physique theorique session 28, 28 July-6 Sept., 1975},
	address = {Amsterdam}
}