5Freiberg, H. Jerome. (Summer , 1981) Three Decades of the Flanders Interaction Analysis System. Journal of Classroom Interaction, 16(2), 1-7.
6Silverman, Stephen & Buschner, Craig. (Win-Sum,1990 ). Validity of Cheffers Adaptation of Flanders Interaction Analysis System. Journal of Classroom Interaction, 25(1-2), 23-28.
7Peace, Sandra DeAngelis & Sprinthall, Norman A. (Jun 1998). Training School Counselors to Supervise Beginning Counselors: Theory, Research, and Practice. Professional School Counseling, 1 (5), 2- 8.