@article{article348ed9d2,
title   = {Improved bound for the Caratheodory rank of the bases of a matroid},
author = {Pina Júnior, José Coelho de and Soares, José Augusto Ramos},
year = {2003},
doi = {10.1016/s0095-8956(03)00034-0},
journal   = {Journal of Combinatorial Theory. Series B}
}