If you're really keen there's a pretty good chapter on it in 'Design for Air Combat' by Ray Whitford. The intake chapter is about 30 pages long and only talks about things qualitively ie no maths at all. Don't know if that'd be the kind of thing you're looking for.
It discusses all the various shapes and also talks a lot about intake location.
I looked all over the UK and web to get hold of my copy and eventually found one in the used books section of Barnes and Noble -
www.bn.com - I just checked and there's one there for $42.