Arponen, A., Heikkinen, R. K., Paloniemi, R., Pöyry, J., Similä, J. & Kuussaari, M. (2013) Improving conservation planning for semi-natural grasslands: Integrating connectivity into agri-environment schemesBiological conservation 160: 234241. http://dx.doi.org10.1016/j.biocon.2013.01.018