I'll be using the Grasp2K relativistic atomic structure package this year, and I'm trying to find some good sources of information on the Hartree-Fock method. I'm having trouble getting my head around some of the finer points, so I figure the best thing to do is get my hands on as many sources as possible. So far Physics of Atoms and Molecules by Bransden and Joachain has been quite useful, but the more sources the better. If anyone here has come across something good I would greatly appreciate any recommendations. Thanks.