1. Rising temperatures reduce global wheat production
2. Analysis of tendencies in agribusiness networking coopetition in Poland and in the partner countries;Bojar, W.;Journal Central European Agriculture (JCEA),2008
3. Selected methods of reducing risk factors in agriculture in the light of contemporary challenges;Bojar, W.;Roczniki Naukowe Ekonomii Rolnictwa i Rozwoju Obszarow Wiejskich,2014
4. Analysis of the influence of climatic conditions on crop yielding in the Kujawsko-Pomorskie region;Bojar, W.;Studies & Proceedings of Polish Association for Knowledge Management,2013
5. Integrated assessment of crop productivity based on the food supply forecasting;Bojar, W.;Agric. Econ – Czech,2015