Did you get millihelens from Asimov?

I got it from a college roommate, and I have no idea where he got it from. Certainly could have been Asimov, as he was familiar with Asimov's work, and I never asked him for a source. Then again, I was familiar with Asimov's work too, even when the Foundation series first came out as novelettes, and I don't recall seeing it there, then or later.

Edit: a quick Googling of Asimov/milliHelen gives a bunch of attributions to IA but in my brief review I see no documentation or reference. Even if there were, I would think it a good candidate for being a clever and appealing term with multiple independent inventors.