PELTONEN-SAINIO, P., L. JAUHIAINEN, and K. HAKALA. “Climate Change and Prolongation of Growing Season: Changes in Regional Potential for Field Crop Production in Finland”. Agricultural and Food Science 18, no. 3-4 (January 3, 2009): 171-190. Accessed August 4, 2020. https://journal.fi/afs/article/view/5948.