The Practice of Enterprise Modeling 6th IFIP WG 8.1 Working Conference, PoEM 2013, Riga, Latvia, November 6-7, 2013, Proceedings - Grabis, Janis.; Grabis, Janis.; Kirikova, Marite.; Kirikova, Marite.; Zdravkovic, Jelena.; Zdravkovic, Jelena.; Stirna, Janis.; Stirna, Janis. (Springer Berlin Heidelberg : Imprint: Springer, 2013)