Gasteiger, H., Brunner, E. & Chen, C. (2020, online first). Basic conditions of early mathematics education – a comparison between Germany, Taiwan and Switzerland. International Journal of Science and Mathematics Education. DOI:10.1007/s10763-019-10044-x.
Online First: 
Die Bezeichnung "online first" nach year-of-publication anzeigen.
Gasteiger, H., Brunner, E. & Chen, C. (2020, online first). Basic conditions of early mathematics education – a comparison between Germany, Taiwan and Switzerland. International Journal of Science and Mathematics Education. DOI:10.1007/s10763-019-10044-x.