Geahča maid: The sexual aspect of paedophile relations :
- Sexual preference and work : a comparison between homosexual and heterosexual persons /
- Unnatural relations /
- Relatively Norma /
- Boys on their contacts with men : a study of sexually expressed friendships /
- Homosexuality and family relations /
- Relationally queer : a pink therapy guide for practitioners /
Dahkki: Sandfort, Theo
- Male intergenerational intimacy : historical, socio-psychological, and legal perspecives /
- Boys on their contacts with men : a study of sexually expressed friendships /
- Het belang van de ervaring : over seksuele contacten in de vroege jeugdjaren en seksueel gedrag en beleven op latere leeftijd /
- The sexual aspect of paedophile relations : the experience of twenty-five boys /
- Sexual preference and work : a comparison between homosexual and heterosexual persons /