search query: @instructor Ravaska, Olli / total: 3
references: 2-3 / 3
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| title | year | author | ||
| 2. | 2009 | Saljola, Suvi |
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| 3. | 1988 | Liukas, Juha |
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| title | year | author | ||
| 2. | 2009 | Saljola, Suvi |
||
| 3. | 1988 | Liukas, Juha |