Colin Atkinson 0001 Dietmar Stoll Christian Tunjic 67-70 2011 EDOCW https://doi.org/10.1109/EDOCW.2011.20 https://doi.ieeecomputersociety.org/10.1109/EDOCW.2011.20 https://www.wikidata.org/entity/Q57400944 conf/edoc/2011w db/conf/edoc/edoc2011w.html#AtkinsonST11