Relay based closed loop transfer function estimation. - Gustavo Henrique Machado de Arruda; Péricles Rezende Barros (ACC, 2000)

On a relay experiment for frequency response estimation. - Gustavo H. M. de Arruda; P. Rezende Barros (ECC, 2001)

Relay-based closed loop transfer function frequency points estimation. - Gustavo H. M. de Arruda; Péricles R. Barros (Autom., 2003)

Relay-based gain and phase margins PI controller design. - Gustavo H. M. de Arruda; Péricles R. Barros (IEEE Trans. Instrum. Meas., 2003)