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)