Measurement uncertainty in the presence of low-frequency noise. - Panu Helistö; Heikki Seppä (IEEE Trans. Instrum. Meas., 2001)

Analysis of different measurement setups for a programmable Josephson voltage standard. - Ralf Behr; Johannes Kohlmann; Theodoor J. B. M. Janssen; Peter Kleinschmidt; Jonathan M. Williams; Sophie Djordjevic; Jean-Pierre Lo-Hive; François P. M. Piquemal; Per-Otto Hetland; Dominique Reymann; Gunnar Eklund; Christian Hof; et al. (IEEE Trans. Instrum. Meas., 2003)

AC voltage standard based on a programmable SIS array. - Panu Helistö; Jaani Nissilä; Kari Ojasalo; Jari S. Penttilä; Heikki Seppä (IEEE Trans. Instrum. Meas., 2003)

Analysis of international comparisons with the minimum variance method. - Panu Helistö; Heikki Seppä (IEEE Trans. Instrum. Meas., 2003)

Stimulated power generation in ES-SIS junction arrays. - Juha Hassel; Panu Helistö; Leif Grönberg; Heikki Seppä; Jaani Nissilä; Antti Kemppinen (IEEE Trans. Instrum. Meas., 2005)

Realization of a square-wave voltage with externally-shunted SIS Josephson junction arrays for a quantum AC voltage standard. - Jaani Nissilä; Antti Kemppinen; Kari Ojasalo; Juha Hassel; Antti Manninen; Panu Helistö; Heikki Seppä (IEEE Trans. Instrum. Meas., 2005)