1] Željko Vaško Trade in agricultural products on green and livestock markets in Republic of Srpska" - II međunarodni simpozijum i 18-to naučno-stručno savjetovanje agronoma Republike Srpske, 18.02.2013.
(https://ekonferencije.com/sr/rad/trade-in-agricultural-products/2025)

2] Željko Vaško The vertical coordination in the agro-food supply chain" - REDETE 2012, 01.06.2012.
(https://ekonferencije.com/sr/rad/the-vertical-coordination-in-t/1383)

3] Željko Vaško Agriculture lending in Bosnia and Herzegovina – from the experience of IFAD projects" - REDETE 2011, 14.06.2011.
(https://ekonferencije.com/sr/rad/agriculture-lending-in-bosnia-/713)