EVERITT, Brian - SKRONDAL, Anders. The Cambridge dictionary of statistics [electronic resource]. 4th ed. Cambridge ; New York : Cambridge University Press, c2010. 1 online zdroj (468 s.). Available on Internet: <http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=329356> ISBN 9780511789748.