↑Castilla Penaranda, C. I. (2009). Leo Brouwer’s Estudios Sencillos for Guitar: Afro-Cuban Elements and Pedagogical Devices [University of Southern Mississippi]. [1]
↑Kim, N. T. (2007). The Emergence of Leo Brouwer’s Compositional Periods: The Guitar, Experimental Leanings, and New Simplicity [Senior Honors Thesis]. [2]