1999
C. Mosquera, Pérez-González, F., y López-Valcarce, R., «Hyperstable polyphase adaptive IIR filters», in IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Phoenix, AZ, USA, 1999, vol. 4, pp. 1841–1844.
R. López-Valcarce y Dasgupta, S., «A new proof for the stability of equation-error models», IEEE Signal Processing Letters, vol. 6, pp. 148–150, 1999.
R. López-Valcarce y Pérez-González, F., «Some remarks on the lattice form of the Steiglitz-McBride iteration», IEEE Signal Processing Letters, vol. 6, pp. 290–292, 1999.
R. López-Valcarce y Dasgupta, S., «On the stability of the inverse time-varying prediction error filter obtained with the RWLS algorithm», in IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Phoenix, AZ, USA, 1999, vol. 3, pp. 1673–1676.
R. López-Valcarce y Dasgupta, S., «Stable estimates in equation-error identification: an open problem», in Open Problems in Mathematical Systems and Control Theory, Springer-Verlag, 1999.