@article {, title = {Current Trends in Theoretical Computer Science. The Challenge of the New Century }, year = {2004}, note = {Gheorghe Paun; Grzegorz Rozenberg; Arto Salomaa (eds.)}, publisher = {World Scientific}, address = {New Jersey, Estados Unidos}, isbn = {981-238-965-2}, author = {Gheorghe Paun and Grzegorz Rozenberg and Arto Salomaa} }