TY - DATA AU - Angelika Bikner-Ahsbahs AU - Andreas Vohns AU - Oliver Schmitt TI - Theories in and of Mathematics Education T2 - ICME-13 Topical Surveys SN - 9783319425894 PB - Springer KW - Education UR - https://link.springer.com/openurl?genre=book&isbn=978-3-319-42589-4 ER -