The first is by Leuer, which examines Baader’s corresondence, philosophy of nature, and theosophical views:
Dennis Osborn Leuer, “The Life and Works of Franz von Baader,” (Doctoral dissertation, University of Oxford, 1976), online at [http://ora.ox.ac.uk/objects/uuid:a75f97cc-8968-40ad-8529-25f6e48396e5]
John Glenn Blackburn has also done some research on Baader, though harder to get:
John Glenn Blackburn, “Franz von Baader’s Philosophy of Society,” (Master’s thesis?, University of North Carolina at Chapel Hill, 1968).
___, “Franz von Baader: A Liberal Catholic,” (Dissertation, University of North Carolina, Chapel Hill, 1974).