%0 Journal Article %A Sahbi, Rafik %T Solutions to four open problems on quorum colorings of graphs %J RAIRO. Operations Research %D 2021 %P 2385-2394 %V 55 %N 4 %I EDP-Sciences %U https://www.numdam.org/articles/10.1051/ro/2021116/ %R 10.1051/ro/2021116 %G en %F RO_2021__55_4_2385_0