Luiz Olavo Bonino da Silva Santos Remco Poortinga van Wijnen Peter Vink A service-oriented middleware for context-aware applications. 37-42 2007 MPAC https://doi.org/10.1145/1376866.1376873 https://www.wikidata.org/entity/Q61715568 conf/middleware/2007mpac db/conf/middleware/mpac2007.html#SantosWV07