| Title | Journal | Journal Categories | Citations | Publication Date |
|---|---|---|---|---|
| Strokenaanpak I en II | 1975 | |||
| Weeding and Sowing-Preface to a Science of Mathematical Education | 1978 | |||
| Perception and Understanding in Young Children | 1974 | |||
| Understanding Causality | 1971 | |||
| Piagetian Cognitive Development Research and Mathematical Education | 1971 |