@article{CGTM_2020_13_a0,
     author = {Leon A. Petrosyan and Nikolay A. Zenkevich},
     title = {Preface},
     journal = {Contributions to game theory and management},
     pages = {6--7},
     year = {2020},
     volume = {13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CGTM_2020_13_a0/}
}