Not sure that Immanuel Velikovsky is regarded as an authoritative source. But he is entertaining and I think Catastrophism has merit.
I don't look for names when it comes to appeals to authority, I look at the ideas. Been doing that for nearly 50 years when it comes to Dr. V. If you've got some criticism of what he wrote there, bring it, I'd love to see it, but otherwise it's the only sensible conclusion ever made about where Capthor was. The Egyptians called them the Keftiu, and an Egyptian image of the Keftiu show them carrying the oxhide ingots characteristic of Cyprus' copper trade. All the other "may be here, may be there" arguments are and have been simple speculation.