id: 70783860
dt: a
an: 70783860
au: Kuo, Rita; Lien, Wei-Peng; Chang, Maiga; Heh, Jia-Sheng
ti: Difficulty analysis for learners in problem solving process based on the
    knowledge map
so: ICALT, 386-387 (2003).
py: 2003
pu: 
la: EN
cc: 
ut: 
ci: 
li: http://doi.ieeecomputersociety.org/10.1109/ICALT.2003.1215136