Improving performance of agriculture and the economy : challenges for management and policy. International scientific conference. International scientific days 2014 : improving performance of agriculture and the economy : challenges for management and policy : proceedings of reviewed articles of [13th] international scientific conference : may 21 -23, 2014, High Tatras, Slovak Republic. Nitra : Slovak University of Agriculture in Nitra, 2014. CD-ROM [510 s.]. ISBN 978-80-552-1187-9.