@article {uvigo:polyjnl, title = {Hyperstable adaptive IIR algorithms with polyphase structures: analysis and design}, journal = {IEEE Transactions on Signal Processing}, volume = {47}, number = {7}, year = {1999}, month = {July}, pages = {2043{\textendash}2046}, keywords = {adaptive IIR filters, system identification}, author = {R. L{\'o}pez-Valcarce and C. Mosquera and Fernando P{\'e}rez-Gonz{\'a}lez} }