search query: @keyword longterm co-operation / total: 2
references: 1-2 / 2
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| title | year | author | ||
| 1. | 1998 | Pekkanen, Petteri |
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| 2. | 1998 | Pekkanen, Petteri |
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| title | year | author | ||
| 1. | 1998 | Pekkanen, Petteri |
||
| 2. | 1998 | Pekkanen, Petteri |