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2. Lecture Notes in Computer Science;M. Kirikova,2010
3. SFIA Foundation, Framework reference SFIA version 5,
http://www.sfia.org.uk/v5/en/
4. European Committee For Standardization, European e-Competence Framework 2.0,
http://ecompetences.eu/
5. Latvian Nacional Occupation Standard Registry,
http://visc.gov.lv/saturs/profizgl/stand_registrs.shtml