Advanced Power Electronics for Reducing mains Pollution - Active Power filters and Optimized Utility Interfaces. - Jürgen Häfner; M. Aredes; Klemens Heumann (J. Circuits Syst. Comput., 1995)

Fuzzy logic applied to compensation equipment in power electronics. - Jürgen Häfner; Hans-Heinrich Bothe; Klemens Heumann (SAC, 1996)