1. On Cremona Transformations of P^3 which factorize in a minimal form (pdf)

2. On Cremona Transformations of P^3 with all possible bedegree (pdf)

3.  (Joint with R. Baltazar) On solutions for derivation of a Noetherian k-algebra (pdf)


4.  (joint with A. Rittatore) Some remarks about the Zariski Topology of the Cremona group (pdf)