I believe someone asked for the staff and casts, here they are:
Mangas info can be easily found on online dealers product info.
I'll look for information about the Short OVAs on some Japs websites, if I don't find anything we check the official page or use voice comparison with the movie.
I believe the der Film OVA uses the same cast as the movie as no new characters are added.
Note: There is a dub director under the German language on Der Film, googled it and didn't find anything related to a German release
If noone asked I'll leave here as personal index.