Publicações

1. V. O. Ferreira, "Tensor rings under field extensions", J. Algebra 231(1), 342-363 (2000).
2. V. O. Ferreira, "Commutative monoid amalgams with natural core", Comm. Algebra 29(2), 757-767 (2001).
3. V. O. Ferreira, "Constants of derivations on free associative algebras", Glasgow Math. J. 44(1), 177-183 (2002).
4. V. O. Ferreira, L. S. I. Murakami, A. Paques, "A Hopf-Galois correspondence for free algebras, J. Algebra 276(1), 407-416 (2004).
5. V. O. Ferreira, J. Z. Gonçalves, A. Mandel, "Free symmetric and unitary pairs in division rings with involution", Internat. J. Algebra Comput. 15(1), 15-36 (2005).
6. V. O. Ferreira, L. S. I. Murakami, "Finitely generated constants of free algebras", in Groups, Rings, and Group Rings, 149-153, Lecture Notes in Pure and Appl. Math., 248, Chapman & Hall/CRC, Boca Raton, FL, 2006.
7. V. O. Ferreira, L. S. I. Murakami, "Finitely generated invariants of Hopf algebras on free associative algebras",  Linear Algebra Appl. 420(1), 70-78 (2007).
8. V. O. Ferreira, L. S. I. Murakami, "On free associative algebras linearly graded by finite groups", in Groups, Algebras and Applications, 185-191, Contemporary Mathematics, 537, Amer. Math. Soc., Providence, RI, 2011.
9. V. O. Ferreira, E. Z. Fornaroli, J. Sánchez, "Free fields in Malcev-Neumann series rings", Comm. Algebra, 41(3), 1149-1168 (2013).
10. V. O. Ferreira, L. S. I. Murakami, "Rationality of the Hilbert series of Hopf-invariants of free algebras", Proc. Amer. Math. Soc., no prelo.