In observance of the 33rd anniversary of the release of 90125, there is an article about the making of the album at the Team Rock website:
http://teamrock.com/feature/2016-11-07/the-albums-that-saved-prog-yes-90125
Although it is not indicated, it's actually the same article I commented on when it was originally published back in 2014:
http://rabinesque.blogspot.com/2014/10/media-watch-prog-magazine-november-2014.html
For anyone who has not read it before it is interesting and informative, although my commentary provides a few details as well.