Looking for academic work on Landmark

I am a professor contemplating doing some research on the workings and impact of Landmark, and the penetration of Erhard's ideas within academia. As a first step, I plan to complete a review of what has been written about Landmark in academia. So far, I found a few master's theses (most being written by people describing how LM changed their lives and could change the world!), but I would need a complete list of the theses, dissertations, articles, reports and books written by both supporters and critics.
If you know of any work of this kind or of other people involved in a similar endeavour in an academic context, please let me know.I would be particularly interested in work related to the new 'ontological leadeship' training developed by Erhard.
Thanks!