Perkhach, Oksana     Improvement of regulation system and strategic planning of investment operations at meso level [Текст] / Oksana Perkhach, Oksana Khymych // The agri-food value chain: challenges for natural resources management and society : intern. sci days 2016, May 19-20, 2016, Nitra, Slovak Republic : book of abstr. / Fac. of Economics and Management, Slovak Univ. of Agr. in Nitra, Visegrad Univ. Assoc., Society of Agr. Experts at the SUA in Nitra, Assoc. of Agr. Economists in Slovakia. — Nitra, 2016. — P. 272-278.