UBI-hotspots: sustainable ecosystem infrastructure for real world urban computing research and business. - Timo Ojala; Ville Valkama; Hannu Kukka; Tommi Heikkinen; Tomas Lindén; Marko Jurmu; Fabio Kruger; Simo Hosio (MEDES, 2010)

Stakeholder value propositions on open community testbed of interactive public displays. - Ville Valkama; Timo Ojala (MEDES, 2011)

Two field trials on the efficiency of unsolicited Bluetooth proximity marketing. - Timo Ojala; Fabio Kruger; Vassilis Kostakos; Ville Valkama (MUM, 2012)