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Nowoczesne Systemy Zarządzania > 2020 > T. 15, nr 2 > 87--104
Polish Journal of Management Studies > 2020 > Vol. 21, No. 1 > 432--446
Journal of KONBiN > 2020 > Vol. 50, iss. 2 > 19--28
Transport Problems > 2020 > T. 15, z. 1 > 155--161
Geoinżynieria : drogi, mosty, tunele > 2020 > nr 1 > 82--85
Research in Logistics & Production > 2020 > Vol. 10, No. 1 > 23--34
Scientific Journal of Gdynia Maritime University > 2020 > nr 116 > 88--99
Annals of Computer Science and Information Systems > 2020 > Vol. 21 > 579--585
LogForum > 2020 > Vol. 16, no. 4 > 573--592
Logistics and Transport > 2020 > Vol. 45-46, No. 1-2 > 5--18
Rocznik Ochrona Środowiska > 2020 > Tom 22, cz. 1 > 156--170