A calculable impulse voltage calibrator for calibration of impulse digitizers. - Jari K. Hällström; Yury Chekurov; Martti M. Aro (IEEE Trans. Instrum. Meas., 2003)

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)