@unpublished{PlieningerSchleyerManteletal.2013,
  author  = {Tobias Plieninger and Christian Schleyer and Martin Mantel and Patrick Hostert},
  title   = {Is there a forest transition outside forests? : Trajectories of farm trees and effects on ecosystem services in an agricultural landscape in Eastern Germany},
  institution = {Drittmittelprojekt {\"O}kosystemleistungen},
  year    = {2013},
}