→External links: added links to https://www.britannica.com/biography/Ratramnus and https://www.britannica.com/biography/Berengar-of-Tours Berengar of Tours - Britannica
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==External links==
==External links==
*[https://www.catholic.com/tract/the-real-presence The Real Presence (catholic.com)] ''A history of the doctrine.''
*[https://www.catholic.com/tract/the-real-presence The Real Presence (catholic.com)] ''A history of the doctrine.''