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The function of annotations in the comprehension of scientific texts: Cognitive load effects and the impact of verbal ability[J] . Erik Wallen,Jan L. Plass,Roland Brünken.Educational Technology Research and Development . 2005 (3)
[2]
Cognitive Load Theory and Instructional Design: Recent Developments[J] . Fred Paas,Alexander Renkl,John Sweller.Educational Psychologist . 2003 (1)

