Request for help ...

A law student (Catholic) has sent me a bibliographic inquiry:

"Do you know of any good articles pertaining to the Doctrine of Double Effect?  I have Aquinas, but I was wondering if you knew any specifically relating to abortion (or even capital punishment).

Do you know where I can find the Catholic Church's position on the "life of the mother" issue in abortion?  I remember reading that they have allowed for exceptions in ectopic pregnancies and cancer, but do you know where I can get an official statement (if any) or any discussion on the Catholic position?"

So:  Can anyone out there help by recommending one or more especially good--and accessible--discussions of the Doctrine of Double Effect?  Or one or more good/accessible discussions of the DDE as it relates to abortion and/or capital punishment?

My e-mail:  [email protected]

Thanks very much.
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mp