@book{180486,
	author = {Виноградов, И. М.},
	title = {Математическая энциклопедия. Т. 1 :},
	publisher = {Советская энциклопедия,},
	year = {1977.},
	series = {Энциклопедии, словари, справочники},
	address = {Москва :}
}