Jos&#233; Manuel Cantera Fonseca; Rhys Lewis. <a href="http://www.w3.org/TR/2009/WD-dcontology-20090616"><cite>Delivery Context Ontology.</cite></a> 16 June 2009. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2009/WD-dcontology-20090616/">http://www.w3.org/TR/2009/WD-dcontology-20090616/</a>