RILM abstract: "A system of realization is used to address the problem of partial signatures in vocal polyphony and the adjustments of accidentals they require. Its principles are applied to the first 18 measures of the Credo of the Mass by Reginaldus Libert. If some latitude in the governing criteria is allowed, it is feasible to realize partial signatures in a systematic manner."
Moll, Kevin N.
"Realizing Partial Signatures around 1400: Liebert's Credo as a Test Case,"
Performance Practice Review:
2, Article 7.
Available at: https://scholarship.claremont.edu/ppr/vol10/iss2/7