- Excommunications show a Pope Leo unafraid of making firm decisions Reuters
- Vatican Excommunicates Society of St. Pius X, in First Major Crisis for Pope Leo The New York Times
- What to know about the Society of St. Pius X, the schismatic group excommunicated by the Pope NPR
- Excommunication decreed for Lefebvrite episcopal ordinations Vatican News
- Bishop urges Catholics to avoid Waunakee church tied to excommunicated group Channel 3000