search query: @keyword PSA / total: 21
references: 20-21 / 21
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| title | year | author | ||
| 20. | 2002 | Kupila, Jukka |
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| 21. | 2002 | Kupila, Jukka |
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INSSI
| title | year | author | ||
| 20. | 2002 | Kupila, Jukka |
||
| 21. | 2002 | Kupila, Jukka |