Books
Bataille, Georges. The Trial of Gilles de Rais (1965)(English translation, 1991).
Bartlett, Robert. Trial by Fire and Water: The Medieval Judicial Ordeal (Echo Point Books, 2014).
Fudge, Thomas A. The Trial of Jan Hus: Medieval Heresy and Criminal Procedure (Oxford, 2013).
Jager, Eric. The Last Duel: A True Story of Crime, Scandal, and Trial by Combat in Medieval France (Broadway Books, 2005).
Magnusson, Magnus and Palsson, Hermann, editors. Njal's Saga (Classics, 1960 ).
Article
Moore, Michael Edward. The Body of Pope Formosus (pdf)
Links
Wikipedia, Trials by Ordeal
Wikipedia, Compurgation
Wikipedia, The Cadaver Synod
Atlas Obscura, The Cadaver Synod
Stephen Lahey, U. of Nebraska, The Cadaver Synod
An Account of the Duel Between Jean de Carrouges and Jacques le Gris (Chronicle of the Monk of St. Denis)
Medieval Death Trap Episode 24: How Edward Put His Mother to the Ordeal