It's not a problem, really, I just think it's a good idea to tell people if you're citing your own pages, in general. It's by no means awful to do so, but it's better to let people know, so they don't think that your claim is corroborated by an external source when it isn't.
If you think I have a problem with you, or something, I don't. So don't worry about it.
The source is well-known and long-time Lisper Mikel Evins who worked for Apple in various projects and also in these projects where Lisp-based operating systems were developed. Mikel has multiple times mentioning and describing this work. You even find it here on Hackernews, where he is a user. Just google for it. I see that he is even participating in this thread now.
Sorry for giving you grief over... everything, but I can't say I entirely regret it. I learned a lot that I wouldn't have otherwise, which is why I use HN in the first place.