Chudnovsky, Maria, Ries, Bernard and Zwols, Yori. (2011) Claw-free graphs with strongly perfect complements. Fractional and integral version. Part I. Basic graphs. Discrete Applied Mathematics, Vol.159 (No.17). pp. 1971-1995. ISSN 0166-218X

Ries, Bernard. (2010) Complexity of two coloring problems in cubic planar bipartite mixed graphs. Discrete Applied Mathematics, Vol.158 (No.5). pp. 592-596. ISSN 0166-218X

Dabrowski, K, Lozin, Vadim V., Raman, R. and Ries, Bernard (2010) Colouring vertices of triangle-free graphs. In: 36th International Workshop on Graph-Theoretic Concepts in Computer Science, Zaros, Greece, 28-30 Jun 2010. Published in: Lecture Notes in Computer Science, Vol.6410 pp. 184-195.

Ekim, Tinaz, Ries, Bernard and de Werra, Dominique. (2010) Split-critical and uniquely split-colorable graphs. Discrete Mathematics & Theoretical Computer Science, Vol.12 (No.5). pp. 1-24. ISSN 1365-8050