@conference {uvigo:stable, title = {Stable estimates in equation error identification}, booktitle = {IEEE Conference on Decision and Control (CDC)}, volume = {2}, year = {1997}, month = {December}, pages = {1678{\textendash}1679}, address = {San Diego, CA, USA}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} }