1. Alegre U, Carlos Augusto J, Clark T (2016) Engineering context-aware systems and applications: a survey. J Syst Softw 117:55–83
2. Allen JF (1983) Maintaining knowledge about temporal intervals. J. Commun ACM 26(11):832–843
3. Becker C, Nicklas D (2004) Where do spatial context-models end and where do ontologies start? A proposal of a combined approach. In: Proceedings of first international workshop on advanced context modelling, reasoning and management in conjunction with UbiComp2004, pp 48–53
4. Bobek S, Nalepa GJ (2017) Uncertainty handling in rule-based mobile context-aware systems. Pervas Mob Comput 39:159–179
5. Bryant DJ, Tversky B, Lanca M (2000) Retrieving spatial relations from observation and memory. In: van der Zee E, Nikanne U (eds) Cognitive interfaces: constraints on linking cognitive information. Oxford University Press, Oxford, pp 94–115