Decomposability and co-modular indices of tournaments. - Houmem Belkhechine; Cherifa Ben Salha (Discret. Math., 2021)

Making a Tournament Indecomposable by One Subtournament-Reversal Operation. - Houmem Belkhechine; Cherifa Ben Salha (Graphs Comb., 2021)

Tournaments with maximal decomposability. - Cherifa Ben Salha (Discret. Math., 2022)

Birecognition of prime graphs, and minimal prime graphs. - Houmem Belkhechine; Cherifa Ben Salha; Pierre Ille (Discret. Math. Algorithms Appl., 2022)

Irreducible Pairings and Indecomposable Tournaments. - Houmem Belkhechine; Cherifa Ben Salha; Rim Romdhane (Graphs Comb., 2024)

Subprime and superprime graphs. - Houmem Belkhechine; Cherifa Ben Salha; Rim Romdhane (Discret. Appl. Math., 2025)