search query: @keyword digital exchange / total: 7
references: 4-7 / 7
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title | year | author | ||
4. | 1991 | Tervonen, Tuomo |
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5. | 1990 | Kallioniemi, Tapio |
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6. | 1988 | Vastela, Riku |
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7. | 1986 | Oksanen, Toni |
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