:Agte was discussed on the Reliable Sources Noticeboard: Agte I and Agte II, and also in more detail on Jochen Peiper's article Talk page with additional down votes. The conclusion was that Agte is non a WP:RS source. The discussion centered on his book on Peiper; but I believe the same applies to his book on Whittmann and the claims of 'single handedly stopped a Russian tank'. The fact that Wolff was decorated is not in question, as various records exist. The wording around the tank attack is what's questionable.