Luftwaffe fighter defence organisation

Greetings all,

As the term paper for my Systems Engineering option, I want to do a
systems comparison between Fighter Command, the Jagdwaffe, and the
Nachtjagd C^3 systems. I've been able to find a loads on Fighter
Command, but precious little on the German side that gives command
structure and organisational data. Most of the references I've got
concentrate on the aircraft used, rather than C^3. Could anyone make
any useful suggestions for books, papers, journal articles etc. that I
could use to research this?

Cheers,

Jakob