ORESKÝ, Milan. Crisis impact on company procurement systems. In Current challenges of marketing and their application in practice : [proceedings of] scientific articles. - Bratislava : Publishing house EKONÓM, 2013. ISBN 978-80-225-3632-5, s. 96-104. VEGA 1/0418/11. 1/0418/11, VEGA, Udržateľný marketing a udržateľná spotreba.