@inproceedingsSchumacher_Rezat, place=Utrecht, the Netherlands, title=A Hypothetical Learning Trajectory for the Learning of the Rules for Manipulating Integers, booktitle=Proceedings of the Eleventh Congress of the European Society for Research in Mathematics Education (CERM, February 6 – 10, 2019), publisher=Freudenthal Group &; Freudenthal Institute, Utrecht University and ERME, author=Schumacher, Jan and Rezat, Sebastian, editor=Jankvist, Uffe Thomas and Van den Heuvel-Panhuizen, Marja and Veldhuis, MichielEditors 
LibreCat: /record/13107