Two resources for you that I find helpful.
First, here is the site where all the Vatican written materials are stored. Doctor Mellifluuus is one such document about Saint Bernard of Clairvaux. Also, check out each of the Ecumenical Councils at the top of the page.
https://www.newadvent.org/library/
Secondly, here is the actual document.
https://www.newadvent.org/library/docs_pi12dm.htm
Pass it on, if you think this is of value.
uodg