International comparison of a pulse calibrator used in high-voltage impulse calibration. - Yi Li; Juris Rungis; Terry R. McComb; Wolfgang Lucas (IEEE Trans. Instrum. Meas., 2001)

Comparison of two impulse calibrators with a high-resolution digitizer. - Yi Li; Jari K. Hällström; Wolfgang Lucas (IEEE Trans. Instrum. Meas., 2005)

Worldwide Comparison of Lightning Impulse Voltage Measuring Systems at the 400-kV Level. - Jari K. Hällström; Martti M. Aro; Anders Bergman; V. Bovier-Lapierre; F. Garnacho; J. I. Juvik; V. Kiseliev; Z. Lian Hong; Wolfgang Lucas; Yi Li; M. L. Pykälä; Juris Rungis; et al. (IEEE Trans. Instrum. Meas., 2007)

High-Accuracy Comparison of Lightning and Switching Impulse Calibrators. - Takayuki Wakimoto; Jari K. Hällström; Yury Chekurov; Masaru Ishii; Wolfgang Lucas; Jukka Piiroinen; Hiroyuki Shimizu (IEEE Trans. Instrum. Meas., 2007)

Performance of a Wideband 200-kV HVDC Reference Divider Module. - Jari K. Hällström; Anders Bergman; Serkan Dedeoglu; Alf-Peter Elg; Ernest Houtzager; Wolfgang Lucas; Ahmet Merev; Johann Meisner; Matthias Schmidt; Esa-Pekka Suomalainen; Christian Weber (IEEE Trans. Instrum. Meas., 2014)

Performance of a Modular Wideband HVDC Reference Divider for Voltages up to 1000 kV. - Jari K. Hällström; Anders Bergman; Serkan Dedeoglu; Alf-Peter Elg; Ernest Houtzager; Joni V. Klüss; Tapio Lehtonen; Wolfgang Lucas; Johann Meisner; Ahmet Merev; Tatu Nieminen; Matthias Schmidt; et al. (IEEE Trans. Instrum. Meas., 2015)