125 refences indeed, but the "controversy" section (which contains 50 citations) all cites the same 4 authors, and three of them seems to base their claims on the fourth namely Frieser, and none them seems to be highly regarded by general academia on the subject.
And you are most welcome to name the titles of those books by Eimannsberger and Volckheim, and I won't mind you pointing out the instances where Guderian copied them.