%0 Journal Article %T Special Issue: Mathematical Methods in Economy and Industry 2017 %J Kybernetika %D 2018 %P 1105-1105 %V 54 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_2018__54_6_a0/ %G en %F KYB_2018__54_6_a0