Nicol, Samuel J., Danielle A. Harris, Mark R. Kebbell, and James Ogilvie. “Online Child Sexual Exploitation Material: A Comparison From Police Data on Men Charged With Child Sexual Exploitation Material Exclusively and Men Charged With Contact Child Sexual Abuse Exclusively”. Sexual Offending: Theory, Research, and Prevention 16 (December 15, 2021): 1-18. Accessed April 18, 2024. https://sotrap.psychopen.eu/index.php/sotrap/article/view/4301.