Étude No. 9 is a study in arpeggios and slurred notes, developing musical ideas by Carcassi and Carulli. There is an emphasis on thirds, as in the Fifth Étude.[1]
Santos, Turibio. 1985. Heitor Villa-Lobos and the Guitar, translated by Victoria Ford and Graham Wade. Gurtnacloona, Bantry: Wise Owl Music.
Further reading
Villa-Lobos, sua obra. 1989. Third edition. Rio de Janeiro: MinC-SPHAN/Pró-Memória, Museu Villa-Lobos. Online edition, 2009
Wright, Simon. 1992. Villa-Lobos. Oxford Studies of Composers. Oxford and New York: Oxford University Press. ISBN0-19-315476-5 (cloth); ISBN0-19-315475-7 (pbk).