Q: CI and exchange integrals?

[desmarai #*at*# ERE.UMontreal.CA (Desmarais Normand)]

 Hello,
 	I'm looking for some conceptual discussions on the
 exchange integral at the CI level or any talk on the bielectronic
 CI correlation contributions.  Any references or ideas?
 Furthermore:
 	were could I find explicit formulas for
 	the first and second order CI reduced
 	density matrix over the AOs?                - VERY IMPORTANT!
 	...and maybe an efficient algoritm,         - COULD BE IMPORTANT!
 	and (why not) code in Fortran or
 	C or even C++.                              - WHY NOT?
 Please send your reply to me directly,
 I will sumarize for the list.
 Thank you for your time and attention!
 Normand D.
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  [ Normand Desmarais                   ]
  [ desmarai #*at*# tornade.ere.umontreal.ca   ]
  [ desmarai #*at*# chims1.chimcn.umontreal.ca ]
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