Schirmer, Evelyn ; Altieri, Mike Proceedings of the 14th International Conference on Technology in Mathematics Teaching – ICTMT 14 -- urn:nbn:de:hbz:464-20200520-114633-7 -- 10.17185/duepublico/48820 -- 978-3-940402-23-3 -- https://www.uni-due.de/didmath/veranstaltungen/tagungen/ictmt14/.
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2020