Holy Eucharist
- The questions and answers from numbers 869-894 of the Baltimore Catechism number 3 give a definition of it as Sacrament and as Sacrifice, and elaborates it as institution and miracle.
- http://www.newadvent.org/summa/4083.htm

One Bread One Body
- The Bishops' Conferences of England and Wales, Ireland, and Scotland have produced this teaching document as a way of reaffirming the place of the Mass and the Eucharist it celebrates at the very centre of Catholic life.
- http://www.catholic-ew.org.uk/resource/obob/obob03.htm

Sacrament of Communion
- A Council of Trent pronouncement as to receiving under both species, a true Sacrament is received under either, dispensation, and, little children are not bound to sacramental Communion.
- http://history.hanover.edu/texts/trent/ct21.html

On the Most Holy Sacrament of the Eucharist,
- A rescript of eleven anathemae as given by the Council of Trent, thirteenth session. It removes all doubts as to what is not permitted by addressing critics, skeptics and heresies of that time.
- http://history.hanover.edu/early/Trent/CT13CE.html

Decree Concerning the Most Holy Sacrament of the Eucharist
- The full teaching of the Council of Trent on this Sacrament, thirteenth session.
- http://history.hanover.edu/early/trent/ct13.html

The Real Presence of Jesus Christ in the Sacrament of the Eucharist
- A document by the Committee on Doctrine of the United States Conference of Catholic Bishops expanding on the belief using logic, Sacred Sripture, Papal documents, with Q&A.
- http://www.usccb.org/dpp/realpresence.htm

The Blessed Eucharist as a Sacrament
- The matter, form, effects, necessity, minister and recipient are explained in a Traditional way.
- http://www.newadvent.org/cathen/05584a.htm

Instruction on Eucharistic Worship
- The Sacred Congregation of Rites explains its centrality in the Liturgy of the Church. It makes more intelligible the signs by which it is celebrated as the memorial of the Lord and worshipped as a permanent Sacrament in the Church.
- http://www.ewtn.com/library/CURIA/CDWEUCH.htm

The Real Presence of Christ in the Eucharist
- A look at the Eucharist in Scripture, Miracles, and Liturgy as affected by Vatican II. It contains a list of related feast days, discusses the meaning of the words "Real Presence" and what the early Church believed about it. It contains material
- http://www.therealpresence.org/eucharst/a.html

Pastoral Letter on the Eucharist
- Archbishop Theodore E. McCarrick of Newark, NJ asks the question: "How can you live without the Eucharist?" and proceeds to explain that it "is the center of the entire Christian life."
- http://www.rcan.org/archbish/eucharis.htm

On the Holy Eucharist - Mirae Caritatis
- A traditional treatment of this Sacrament, on its effects and our actions toward it, being an encyclical promulgated by Pope Leo XIII.
- http://www.ewtn.com/library/ENCYC/L13MIRAE.HTM

On the Holy Eucharist
- An encyclical letter promulgated by Pope Paul VI (Mysterium Fidei), shedding more light on the Holy Sacrament of the Eucharist, the re-enactment of the sacrifice of the cross, as celebrated in the Liturgy of the Mass.
- http://www.ewtn.com/library/ENCYC/P6MYSTER.HTM

The Holy Eucharist
- A comprehensive, traditional review of the Doctrine, rounded out by scriptural texts and official Church documents. Includes a Q&A.
- http://www.ewtn.com/faith/teachings/euchmenu.htm

The Eucharist: To be Loved, To be Lived
- A pastoral letter by Thomas J. Tobin, Bishop of Youngstown wherein he instructs the faithful that "in the blessed Eucharist is contained the whole spiritual good of the Church, namely Christ Himself."
- http://www.cfpeople.org/Apologetics/page51a052.html

The Eucharist: Source and Summit of Christian Spirituality
- Mark Brumley exemplifies the title by showing that Christian spirituality flows from it as its source, and that Christian spirituality is supremely realized in and ordered to it.
- http://www.catholic.net/RCC/Periodicals/Faith/0506-96/article3.html

Decree on First Communion (Quam Singulari)
- A declaration by the Sacred Congregation of the Discipline of the Sacraments that expands the Church's view on Holy Communion in the context of "First Communion" of children based on the Bible and sacred Tradition.
- http://www.ewtn.com/library/CURIA/CDWFIRST.htm