Martin Berchtold Till Riedel Michael Beigl Christian Decker AwarePen - Classification Probability and Fuzziness in a Context Aware Application. 647-661 2008 UIC http://dx.doi.org/10.1007/978-3-540-69293-5_51 conf/uic/2008 db/conf/uic/uic2008.html#BerchtoldRBD08