Decree, Quo magis altera, 22 February 2020| www.vatican.va
Decree, Cum sanctissima, 22 February 2020| www.vatican.va
CONGREGATION FOR DIVINE WORSHIP| www.vatican.va
Ecclesia Dei, John Paul II, Motu Proprio, 2 July 1988| www.vatican.va
Motu Proprio Summorum Pontificum on the 'Roman liturgy prior to the reform of 1970' (July 7, 2007)| www.vatican.va
Apostolic Letter issued Motu Proprio Ecclesiae unitatem (July 2, 2009)| www.vatican.va
Decree concerning the Pastoral Office of Bishops - Christus dominus| www.vatican.va
Second Vatican Council| www.vatican.va
Constitution on the Sacred Liturgy - Sacrosanctum Concilium| www.vatican.va
Dogmatic Constitution on the Church - Lumen gentium| www.vatican.va