Mathematical morphology and poset geometry. Bretto, Alain; Li Marzi, Enzo Maria — 2001 International Journal of Mathematics and Mathematical Sciences
Characterization of simple orbit graphs. Bretto, Alain; Faisant, Alain; Jaulin, Cerasela; Tomanová, Jana — 2010 Acta Mathematica Universitatis Comenianae. New Series
Another way for associating a graph to a group Alain Bretto; Alain Faisant — 2005 Mathematica Slovaca