Pope John Paul II's Apostolic letter,Ordinatio Sacerdotalis.
Congregation for the Doctrine of Faith's Responsum ad Dubium to Ordinatio Sacerdotalis.
Ordinatio Sacerdotalis:An Exercise of Infallibility (by Jeff Mirus)
"...In virtue of my ministry of confirming the
brethren I declare that the Church has no authority whatsoever to confer priestly ordination on women and that this judgment is to be definitively held by all the Church's faithful." (Pope John Paul II - Ordinatio Sacerdotalis)