PATTERSON, Kerry. Unit root tests in time series : key concepts and problems. Volume 1. New York : Palgrave Macmillan, 2011. online [xxxvii, 641 p.]. Palgrave texts in econometrics. Available on Internet: <https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=362806&lang=sk&site=ehost-live&scope=site> ISBN 978-0-230-29930-6.