An active power filter and unbalanced current compensator. - Pedro Verdelho; G. D. Marques (IEEE Trans. Ind. Electron., 1997)

DC voltage control and stability analysis of PWM-voltage-type reversible rectifiers. - Pedro Verdelho; Gil D. Marques (IEEE Trans. Ind. Electron., 1998)

Four-wire current-regulated PWM voltage converter. - Pedro Verdelho; Gil D. Marques (IEEE Trans. Ind. Electron., 1998)

A simple slip-power recovery system with a DC voltage intermediate circuit and reduced harmonics on the mains. - Gil D. Marques; Pedro Verdelho (IEEE Trans. Ind. Electron., 2000)