1. Željko Vaško (2013) "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
(https://ekonferencije.com/sr1/rad/trade-in-agricultural-products/2025)

2. Željko Vaško (2012) "The vertical coordination in the agro-food supply chain" - REDETE 2012
(https://ekonferencije.com/sr1/rad/the-vertical-coordination-in-t/1383)

3. Željko Vaško (2011) "Agriculture lending in Bosnia and Herzegovina – from the experience of IFAD projects" - REDETE 2011
(https://ekonferencije.com/sr1/rad/agriculture-lending-in-bosnia-/713)