RT Journal Article SR Electronic T1 Fraud in Digital Advertising: A Multibillion-Dollar Black Hole JF Journal of Advertising Research JO J Advert Res FD WARC SP JAR-2016-024 DO 10.2501/JAR-2016-024 A1 Gian M. Fulgoni YR 2016 UL http://www.journalofadvertisingresearch.com/content/early/2016/05/25/JAR-2016-024.abstract AB