search query: @keyword rikastus / total: 8
references: 5-8 / 8
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title | year | author | ||
5. | 2012 | Penttilä, Olli |
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6. | 2008 | Paloranta, Samuli |
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7. | 1999 | Palmen, Jorma A. |
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8. | 1998 | Kuitunen, Tatu |
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