R. Rodrigues Pereira, C. Henrique da Silva, L. E. Borges da Silva, G. Lambert-Torres, and B. K. Bose, “Adaptive Hysteresis Current Control Of A Pwm Inverter At Constant Modulation Frequency Applied To Shunt Active Power Filters”, Eletrônica de Potência, vol. 15, no. 4, pp. 323–329, Nov. 2010.