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Empirical Research and Standardisation of Measurement
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Empirical Research and Standardisation of Measurement
in the Area of Didactics of Informatics, volume 1 of GI-Edition -- Lecture Notes in Informatics (LNI) --
Seminars, page 39--49. Bonn, Dagstuhl-Seminar of the German Informatics Society
(GI) 19.--24.~September 2004, Köllen Druck+Verlag GmbH, (September 2004)