1. Adamopoulos, P. & Tuzhilin, A. (2014). On over-specialization and concentration bias of recommendations: Probabilistic neighborhood selection in collaborative filtering systems. In Proceedings of the 8th ACM conference on recommender systems (pp. 153–160). ACM.
2. Adamopoulos, P., & Tuzhilin, A. (2015). On unexpectedness in recommender systems: Or how to better expect the unexpected. ACM Transactions on Intelligent Systems and Technology (TIST), 5(4), 54.
3. Ågotnes, T. & Wáng, Y. N. (2015). Resolving distributed knowledge. In R. Ramanujam (Ed.), Proceedings of 15th conference on theoretical aspects of rationality and knowledge, TARK 2015, Carnegie Mellon University, Pittsburgh, USA, June 4–6, 2015 (pp. 31–50). EPTCS.
4. Barber, E., & Merton, R. K. (2004). The travels and adventures of serendipity. Princeton: Princeton University Press.
5. Beth, E. (1955). Semantic entailment and formal derivability. Mededelingen der Koninklijke Nederlandse Akademie van Wetenschappen, 18, 309–342.