Eunlim Chi Chanjung Park Hwakyung Rim Evaluating the Web-Based Instruction by Item Analysis. 901-908 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2668&spage=901 2003 conf/iccsa/2003-2 ICCSA (2) db/conf/iccsa/iccsa2003-2.html#ChiPR03