The use of sexually explicit internet material and its antecedents: a longitudinal comparison of adolescents and adults
Archives of Sexual Behavior (2011) - Comment
pubmed: 20623250  doi: 10.1007/s10508-010-9644-x  issn: 1573-2800  issn: 0004-0002 

Jochen Peter, Patti M. Valkenburg