Is Paul Carell an acceptable historiographic source?
So, I'm quite surprised that many wikipedia articles on WW2 military subjects (mostly, battles of the eastern front), quote works of Paul Carell in the bibliography section. Paul Carell, whose real name is Paul Karl Schmidt, is a former SS and notoriously a post-war Wehrmacht apologist. What place can its works take in a rigorous historiographic work? I guess they can be used as a primary source to get an insight from a german SS point of view of the events. But I'm really disturbed to see the works listed in these bibliography sections without any disclaimer, as if they could be treated as an authoritative source on the matter.
As historians, what is your point of view on the matter?