Some suggested reading is this area:

Book:

Sandfort, T. (1987). Boys on Their Contacts with Men: A Study of Sexually Expressed Friendships. Elmhurst, NY: Global Academic Publishers

Academic papers:

Sandfort, T. (1982). The Sexual Aspect of Paedophile Relations. Amsterdam: PAN/Spartacus

Sandfort, T. (1983). Pedophile Relationships in the Netherlands: Alternative Lifestyle for Children? Alternative Lifestyles 5(4), pp. 165-183.

Brongersma, E. (1990). Boy-Lovers and Their Influence on Boys: Distorted Research and Anecdotal Observations. Journal of Homosexuality 20, pp. 145-173.