Some Observations on Judicial Duels, as Practised in Germany by Hugh T. Knight, Jr.
“In this work we will discuss the origins of the judicial duel, its definition and how it differs from other kinds of duels, and its constituent parts and format. We will place particular emphasis upon the different forms of judicial duel, from foot combat with long shields to fully armored combats. While we will make good use of modern academic research to understand our subject, our primary source of understanding will be the medieval Fechtbücher themselves, and the teachings of the men who were actually there, professionally and personally involved with judicial combats.”
http://www.schlachtschule.org/instruction/TheJudicialDuelV.2.pdf