search query: @author Hakkarainen, Timo / total: 3
references: 1-3 / 3
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title | year | author | ||
1. | 2008 | Hakkarainen, Timo |
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2. | 1977 | Hakkarainen, Timo |
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3. | 1974 | Hakkarainen, Timo |
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