À propos de cet article
Publié en ligne: 27 mars 2020
Pages: 19 - 42
Reçu: 06 nov. 2017
Accepté: 16 mai 2018
DOI: https://doi.org/10.2478/udt-2019-0003
Mots clés
© 2019 Yukio Ohkubo et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Ohkubo, Yukio
Dept. of Businessv Administration, The International University of KagoshimaKagoshima, Japan
Strauch, Oto
Institue of Mathematics, Slovak Academy of SciencesBratislava, Slovakia