search query: @keyword strength grading / total: 4
references: 1-4 / 4
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| title | year | author | ||
| 1. | 2012 | Mikkonen, Juha-Matti |
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| 2. | 2009 | Martinkauppi, Vesa |
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| 3. | 2008 | Mattila, Anni |
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| 4. | 2002 | Ylivainio, Jarmo |
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