Vodak, J., J. Soviar, V. Lendel, and M. Varmus. “Proposal of Model for Effective Management of Cooperation Activities in Slovak Companies”. Communications - Scientific Letters of the University of Zilina, Vol. 17, no. 4, Dec. 2015, pp. 53-59, http://journals.uniza.sk/index.php/communications/article/view/468.