Recent Papers of Raul Cordovil:

ball The 3-connected binary matroids with circumference 6 or 7 (with Bráulio Maia Junior and Manoel Lemos ). European Journal of Combinatorics, 30(8) (2009), 1810-1824.
ballpdf-file (228K)

ball An elementary chromatic reduction for gain graphs and special hyperplane arrangements (with Pascal Berthomé, D. Forge, Véronique Vento, and Thomas Zaslavsky). The Electronic Journal of Combinatorics, 16(1), 2009, R121.
ballpdf-file (152K)

ball Dirac's theorem on simplicial matroids (with Manoel Lemos and Cláudia Linhares Sales). Annals of Combinatorics, 13 (2009), 53-63.
ballpdf-file (136K)

ball Removing circuits in 3-connected binary matroids (with Bráulio Maia Junior and Manoel Lemos ). Discrete Mathematics, 309 (2009), 655-665.
ballpdf-file (192K)

ball The 3-connected matroids with circumference 6 (with Manoel Lemos). Discrete Mathematics, 310 (2010), 1354-1356.
ballpdf-file (220K)