Joachim Kimmerle and  Johannes Moskaliuk and  Ulrike Cress,  Individual Learning and Collaborative Knowledge Building with Shared Digital Artifacts.   journal   = {International Journal of Psychological and Behavioral Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2008, vol. 22(10). 1171 - 1178
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/7501.