1. Scarosanctum Concilium

https://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19631204_sacrosanctum-concilium_en.html

2. Ecclesia De Eucharistia

https://www.vatican.va/holy_father/special_features/encyclicals/documents/hf_jp-ii_enc_20030417_ecclesia_eucharistia_en.html

3. The Theological Vision of Sacrosanctum Concilium and the Roman Missal

https://www.usccb.org/prayer-and-worship/the-mass/general-instruction-of-the-roman-missal/roman-missal/theological-vision-of-sacrosanctum-concilium-and-the-roman-missal

4. Documents of the second Vatican Council

https://www.vatican.va/archive/hist_councils/ii_vatican_council/index.htm

5. Sacramentum Caritatis

https://www.vatican.va/content/benedict-xvi/en/apost_exhortations/documents/hf_ben-xvi_exh_20070222_sacramentum-caritatis.html