@article {uvigo:multipliers, title = {An algorithm for unit-norm equation-error system identification based on the method of multipliers}, journal = {IEEE Transactions on Signal Processing}, volume = {51}, number = {12}, year = {2003}, month = {December}, pages = {3080{\textendash}3085}, keywords = {adaptive IIR filters, equation error, system identification, unit-norm}, author = {R. L{\'o}pez-Valcarce} }