1. Gillies, R.: Cooperative learning: review of research and practice. Aust. J. Teacher Educ. 41(3), 39–51 (2016)
2. Johnson, D.W., Johnson, R.T., Holubec, E.J.: The nuts and bolts of cooperative learning. eMinnesota Minnesota: Interaction Book Company (1994)
3. Johnson, D., Johnson, R.: Learning Together and Alone, Cooperative, Competitive, and Individualistic Learning. Prentice-Hall, Needham Heights, MA (1994)
4. Otte, E., Rousseau, R.: Social network analysis: a powerful strategy, also for the information sciences. J. Inf. Sci. 28(6), 441–453 (2002)
5. Milgram, S.: The small world problem. Psychol. Today 2, 60–67 (1967)