[1]
Brunner, E., Gasteiger, H., Lampart, J. and Schreieder, K. 2019. Mathematics in age-mixed classes in Swiss and in German primary schools: a comparative study. Swiss Journal of Educational Research. 41, 1 (Apr. 2019), 160–176. DOI:https://doi.org/10.24452/sjer.41.1.11.