On a Conjecture of Erwin. - Isma Bouchemakh; Rafik Sahbi (Stud. Inform. Univ., 2011)

On some open problems concerning quorum colorings of graphs. - Rafik Sahbi; Mustapha Chellali (Discret. Appl. Math., 2018)

On the complexity of some quorum colorings problems of graphs. - Rafik Sahbi (AKCE Int. J. Graphs Comb., 2020)

Solutions to four open problems on quorum colorings of graphs. - Rafik Sahbi (RAIRO Oper. Res., 2021)

New sharp lower bound for the quorum coloring number of trees. - Rafik Sahbi (Inf. Process. Lett., 2022)