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Link to original content: https://dblp.org/rec/conf/cscl/LudvigsenM03.xml
Sten R. Ludvigsen Anders I. Mørch Categorisation in Knowledge Building. 67-76 2003 CSCL https://doi.org/10.1007/978-94-017-0195-2_10 conf/cscl/2003 db/conf/cscl/cscl2003.html#LudvigsenM03