[1]
de VriesF.J., KesterL., SloepP., van RosmalenP., PannekeetK. and KoperR. 2005. Identification of critical timeconsuming student support activities in e-learning. Research in Learning Technology. 13, 3 (Oct. 2005). DOI:https://doi.org/10.3402/rlt.v13i3.11219.