search query: @instructor Härkki, Heli / total: 3
references: 1-3 / 3
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title | year | author | ||
1. | 2013 | Laurell, Panu |
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2. | 2012 | Poutanen, Heikki Juhani |
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3. | 2010 | Voutilainen, Vilja |
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