John Soldatos Ippokratis Pandis Kostas Stamatis Lazaros Polymenakos James L. Crowley Agent based middleware infrastructure for autonomous context-aware ubiquitous computing services. 577-591 2007 30 Computer Communications 3 http://dx.doi.org/10.1016/j.comcom.2005.11.018 db/journals/comcom/comcom30.html#SoldatosPSPC07