1. Policy statement: children, adolescents, and the media;VC Strasburger;Pediatrics,2013
2. Television, Internet and mobile usage in the U.S.: A2/M2 Three Screen Report,2009
3. Health effects of media on children and adolescents;VC Strasburger;Pediatrics,2010
4. Digital childhood: electronic media and technology use among infants, toddlers, and preschoolers;EA Vandewater;Pediatrics,2007
5. National Institute for Educational Policy Research. Zenkoku Gakuryoku Gakusyu Jyokyo Cyosa [Japanese]; 2014. Available from: http://www.nier.go.jp/14chousakekkahoukoku/