| 66 | Glasersfeld E. von (1981) An attentional model for the conceptual construction of units and number. Journal for Research in Mathematics Education 12(2): 83–94. |
| 66.1 | German translation: Chapter 20 in 108 (1987). |
| 66.2 | Italian translation: “Un modello attanzionale per la costruzione concettuale delle unità e del numero”, Methodologia 1(2): 5–20. |
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