Modern disk paper
with AGN application, Koratkar and
Blaes (1999), review in PASP:
Basic ideas follow
from Shakura and Sunyaev (1973) standard
alpha thin disks, plus relativity, vertical disk structure, non-LTE, Comptonization, etc. The models of Hubeny et al. (2000) are the most advanced and available on-line:
alpha-disk
solutions illustrate some basic physics and arent too complicated.
Check out S&S73