^Sturr, Jimmy (2013). Polka King: The Life and Times of Polka Music's Living Legend. BenBella Books. p. 229. ISBN 9781937856342. Retrieved January 26, 2017.
^Van Matre, Lynn (March 3, 1988). "U2, Solti Capture Grammys". Chicago Tribune. Tribune Company. p. 1. Retrieved October 19, 2010.