When looking up Christus Dominus, I found that there is a 1953 apostolic constitution by Pius XII by that name, as well as a decree by the Second Vatican Council promulgated by Paul VI.
[list=1]*]Are there any guidelines on referring to such documents, to make clear which document is being cited?
*]Does the Vatican make any effort to keep from issuing documents with conflicting titles? Considering the somewhat limited range of topics that are issued, it is not surprising that two documents would begin with the same words.
*]Are there other documents with identical titles?[/list]