@book{12350,
	author = {Levitan B. M. and Zhikov, V. V. and Zhikov, V. V. ; jt. auth.},
	title = {Almost periodic functions and differential equations},
	publisher = {Cambridge University Press},
	year = {1982},
	address = {Cambridge},
	note = {"Tr. from the Russian by L. W. Longdon".}
}