@book{11013,
	author = {Sinai, Ya G. and Schefer, V. ; tr.},
	title = {Introduction to ergodic theory},
	publisher = {Princeton University Press},
	year = {1977},
	series = {Mathematical notes},
	address = {New Jersey},
	note = {"Based on a series of lectures given at the Moscow and Erevan state Universites"}
}