Esa Rönkkö

Productivity and Cutting Costs of Thinning Harvesters

Kalle Kärhä, Esa Rönkkö, Seppo-Ilmari Gumse, 2004 .

Decline in temperature and humidity increases the occurrence of influenza in cold climate

Olli Vainio, Tiina M. Ikäheimo, Jaana Kauppila, 2014, Environmental Health.