Check Zeiner-Gundersen’s presentation at ICCF-21. Not sure but it could have come out in later questioning.
From: Teslaalset "In fact, it is now becoming evident what Sindre Zeiner-Gundersen may have meant when he said that they are no longer using the Shell catalyst (iron oxide) of Holmlid but have made an improvement." What is the source of this statement?
