%0 Journal Article %A Giorgia Cappello %A Patrizia Daniele,Anna Nagurney %T A system-optimization model for multiclass human migration with migration costs and regulations inspired by the Covid-19 pandemic %J Minimax theory and its applications %D 2021 %V 6 %N 2 %U http://geodesic.mathdoc.fr/item/MTA_2021_6_2_a6/ %F MTA_2021_6_2_a6