@article{articleab0fcae7,
title   = {Finitely generated invariants of Hopf algebras on free associative algebras},
author = {Ferreira, Vitor de Oliveira and Murakami, Lúcia Satie Ikemoto},
year = {2007},
doi = {10.1016/j.laa.2006.06.026},
journal   = {Liear Algebras and its Aplications}
}