1. ABB Power Technologies (n. d.), “Gotland HVDC Light project – Näs – Bäcks, Sweden”, ABB Power Technologies AB Pamphlet, No. POW-0034, 4 pp.
2. Haglöf, L. 2004, “The history of HVDC Part 1: The mercury arc valve era”, HVDC 50 years: Presentation at the Gotland seminar, 6 May.
3. Ingram, L. 2005, “IEEE Honours Historical Achievement in Electrical Engineering”, IEEE Canadian Review, Fall, pp. 5, this article records the recognition by the IEEE of The Nelson River HVDC Transmission System as a Milestone in Electrical Engineering and Computing.
4. Litzenberger, W. 2008, “Advances in HVDC Technology as applied to the Pacific HVDC Intertie”, 2008 IEEE PES Transmission and Distribution Conference and Exposition, April, Technical Session – PN05: HVDC System Solutions’ Slides 1–43.
5. Litzenberger, W. (n. d), “A Short History of the Pacific HVDC Intertie”, Paper provided by the Bonneville Power Administration.