@article {uvigo:newproof, title = {A new proof for the stability of equation-error models}, journal = {IEEE Signal Processing Letters}, volume = {6}, number = {6}, year = {1999}, month = {June}, pages = {148{\textendash}150}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and Soura Dasgupta} }