Krumalova, Veronika; Backman, Stefan(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Humboldt University, Berlin, Germany, 2003)
Gatzweiler, Franz W.; Backman, Stefan; Sipilainen, Timo; Zellei, Anett(Sustainable Agriculture in Central and Eastern European Countries (CEESA), Humboldt University, Berlin, Germany, 2001)
Theesfeld, Insa; Boevsky, Ivan(Central and Eastern European Sustainable Agriculture (CEESA), Humboldt University of Berlin, Department of Agricultural Economics and Social Sciences, Berlin, Germany, 2003)