Company diagnostics, controlling and logistics : 9th international scientific conference : proceedings : 12th–13th April 2018 -Zuberec , Brestová, Slovakia - Madleňák, Radovan; Čorejová, Tatiana; Madleňáková, Lucia (Žilina : University of Žilina, Faculty of Operation and Economics of Transport and Communications Department of Communications, University of Žilina, 2018)