@article {uvigo:notebias, title = {On the bias of the modified output error algorithm}, journal = {IEEE Transactions on Automatic Control}, volume = {43}, number = {9}, year = {1998}, month = {September}, pages = {1261{\textendash}1262}, keywords = {adaptive IIR filters, system identification}, author = {C. Mosquera and R. L{\'o}pez-Valcarce and Fernando P{\'e}rez-Gonz{\'a}lez} }