C. von Haaren, A. Hein, and M. Makala, “The use of information on agrarian structure for strategy development in Spatial Planning: An account of the methods and results of case-studies from the area of planning and support strategies for nature conservation goals”, RuR, vol. 57, no. 5-6, pp. 398–409, Sep. 1999, doi: 10.1007/BF03184508.