4Heidi R.Stallman.Ecosystem services in agriculture:Determining suitability for provision by collectivemanagement.Ecological Economics(2011).
5Pierre Labarthe.Extension services andmultifunctional agriculture.Lessons learnt from the Frenchand Dutch contexts and approaches,Journal ofEnvironmental Management 90(2009)S193–S202.
6Laurens Klerkx,Cees Leeuwis.Matching demand andsupply in the agricultural knowledge infrastructure:Experiences with innovation intermediaries,Food Policy 33(2008)260–276.
7Emmanuel K.Yiridoea,Dominic Odwa Andrea Atarib,Robert Gordonc,Shawn Smaled,Factors influencingparticipation in the Nova Scotia Environmental Farm PlanProgram,Land Use Policy 27(2010)1097–1106.