Generalized n-tuple colorings of a graph: A counterexample to a conjecture of Brigham and Dutton. - Abdelkader Khelladi; Charles Payan (J. Comb. Theory B, 1984)

On shortest cocycle covers of graphs. - François Jaeger; Abdelkader Khelladi; Michel Mollard (J. Comb. Theory B, 1985)

On the domination number of cross products of graphs. - Sylvain Gravier; Abdelkader Khelladi (Discret. Math., 1995)

Exact double domination in graphs. - Mustapha Chellali; Abdelkader Khelladi; Frédéric Maffray (Discuss. Math. Graph Theory, 2005)

New concept of connection in bidirected graphs. - Ouahiba Bessouf; Abdelkader Khelladi (RAIRO Oper. Res., 2018)

Bi-oriented graphs and four valued logic for preference modelling. - Ouahiba Bessouf; Abdelkader Khelladi; Meltem Öztürk; Alexis Tsoukiàs (Ann. Oper. Res., 2023)