| Title | Journal | Journal Categories | Citations | Publication Date |
|---|---|---|---|---|
| 10.1007/BF00381597 | 1970?1971 | |||
| 10.5951/AT.23.6.0468 | ||||
| 10.1017/CBO9781139013536.006 | ||||
| We quote from the same paper: Ibid. 113. We have to be careful and honest if we want to adopt some piece of high mathematics to a lower level. Simplifying is a good thing but wrong elementarisations are a danger and so is imitating superficial features while destroying the great ideas of some mathematical theory. | ||||
| Sowder suggests the following criteria for concrete models: |