search query: @instructor Leppänen, Risto / total: 3
references: 1-3 / 3
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| title | year | author | ||
| 1. | 1996 | Hämäläinen, Sami H. O. |
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| 2. | 1996 | Hakkarainen, Kari |
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| 3. | 1995 | Manner, Tero |
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