Requirements for e-testing services in the afgREN cloud-based e-learning systemSaay, Salim; Laanpere, Mart; Norta, AlexanderTechnology Enhanced Assessment, 19th International Conference, TEA 2016, Tallinn Estonia, October 5–6, 2016 : revised selected papers2017 / p. 133-147 https://doi.org/10.1007/978-3-319-57744-9_12 Conference proceedings at Scopus Article at Scopus Article at WOS