1. Statistisches Jahrbuch des Kantons Luzern 2007,2004
2. “Utfording av renear.”;Âhman,2002
3. Reindeer feeding—possibilities, effects and economy;Åhman;Rangifer Report,2001
4. Distribution, size, and recent trends of the Great Bustard (Otis tarda) in Madrid region, Spain;Alonso;Ardeola,2003
5. Subsidies and trade barriers. The Copenhagen Consensus;Anderson,2004