RILM abstract:"Discusses the four-course guitar from the 15th to the 17th c., the five-course guitar from the late 16th to the early 18th c., and the six-course guitar from the later 18th c."
"The Guitar and its Performance from the Fifteenth to Eighteenth Centuries,"
Performance Practice Review:
1, Article 6.
Available at: https://scholarship.claremont.edu/ppr/vol10/iss1/6