@INBOOK {ABELE:2004b, title = {Introduction, subsistence agriculture in Central and Eastern Europe: how to break the vicious circle? Studies on the Agricultural and Food Sector in Central and Eastern Europe}, author = {Abele, S. and Frohberg, K. }, year = {2004}, volume = {22}, pages = {1--7}, publisher = {IAMO}, address = {Halle/Saale, Germany}, }