Chapter: Ecuaciones y desigualdades. In "Algebra Elemental".
With Irma Beatriz Rumbos Pellicer et. al.
Trillas, 2009. Areas: Elementary algebra.
Polynomial time recognition of uniform cocircuit graphs.
With Kolja Knauer, Juan José Montellano Ballesteros and Ricardo Strausz Santiago.
LAGOS'09, Electron. Notes Discrete Math. 35, Elsevier Sci B. V. Amsterdam (2009) 29-34. Areas: Combinatorics.