I found a page on Google Docs (?) Groups (?), headed by Bernie Cullen and Zdenko Markovic, but most Nordtvedt links failed, and even worse, I failed to bookmark it. They work in mainly I2 and most of my work is in I1, but I wish I had saved the link to provide here. ?Instead, I saved some files locally, but they were quite old and do not seem to pertain to your question. If I stumble on it again, I will post here.
I have looked for archived copies of Ken's site, which is now offline, but without much success. Anyone know of people who have saved material from his old site? I am particularly interested in this document,?.