[1]
de Vries , F.J., Kester , L., Sloep , P., van Rosmalen , P., Pannekeet , K. and Koper , R. 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.