search query: @keyword oil / total: 5
references: 4-5 / 5
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| title | year | author | ||
| 4. | 2010 | Heiska, Arto Heikki |
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| 5. | 2009 | Arkonsuo, Hannu |
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INSSI
| title | year | author | ||
| 4. | 2010 | Heiska, Arto Heikki |
||
| 5. | 2009 | Arkonsuo, Hannu |