Karkalas, S; Mavrikis, M; (2016) Feedback authoring for exploratory learning objects: AuthELO. In: Zvacek, S and Uhomoibhi, J and Costagliola, G and McLaren, BM, (eds.) Proceedings of the 8th International Conference on Computer Supported Education. (pp. pp. 144-153). Science and Technology Publications, Lda: Rome, Italy. Green open access