Source
https://impaxam.com/wp-content/uploads/2019/04/20140930-impax_announces_strong_progress_in_finnish_wind_projects.pdf?pwm=2481, https://www.allianz.com/en/press/news/financials/stakes_investments/160330-finnish-acquisition.html,https://www.thewindpower.net/windfarm_en_25130_kuolavaara-keulakkopaa.php