• Ontology-based retrieval of spatially related objects for location based servicesHaav, Hele-Mai; Kaljuvee, Aivi; Luts, Martin; Vajakas, ToivoOn the Move to Meaningful Internet Systems : OTM 2009 : Confederated International Conferences CoopIS, DOA, IS and ODBASE 2009 : Vilamoura, Portugal, November 1-6, 2009 : proceedings. Part II2009 / p. 1010-1024 https://link.springer.com/chapter/10.1007/978-3-642-05151-7_19