nonso, my friend
This subject has been extensively received attention in these forums and Ron,JAE etc friends once gave me very good inputs
So let me direct you to thread 592-4955 which I posted in Concrete engineering forum asking about the subject
You will find the responses there very helpful.
When it comes to software(I am against blind use of) I know that slabs on grade can be modelled by plates on springs (where necessary) as a method accepted by many institutions. You are not likely to need this complication though. As for books, get anything from PCA.
Good luck
IJR