@article {DaLaLuMaFSD, title = {Finite state dimension}, journal = {Theoretical Computer Science}, volume = {310}, year = {2004}, pages = {1-33}, url = {http://webdiis.unizar.es/~elvira/publicaciones/fsd.ps.gz}, author = {J.J. Dai and J.I. Lathrop and J.H. Lutz and E. Mayordomo} }