Bottomley, L. (2012). Mentoring – Part 6: Setting boundaries. Ready to Go: Mentor Training Tool Kit. Michigan:Michigan State University Extension. Retrieved online at: http://msue.anr.msu.edu/news/mentoring_part_6_setting_boundaries
Karcher, M.J. (2012). The Cross-age Mentoring Program (CAMP) for Children with Adolescent Mentors (four book set). San Antonia: Developmental Press.
Some activities available at crossagepeermentoring.com and described in program materials at www.developmentalpress.com
Spencer, R. & Basualdo-Delmonico, A. (2014). Termination and Closure of Mentoring Relation-ships. In D.L Dubois & M.J. Karcher (Eds.), Handbook of Youth Mentoring, Second Edition (pp. 469−479). Thousand Oaks: SAGE Publications, Inc.
Tuckman, Bruce W. (1965). Developmental sequence in small groups. Psychological Bulletin, 63, 384-399. The article was reprinted in Group Facilitation: A Research and Applications Journal Number 3, Spring 2001.