Carlos, J. T. “Writing Word (Bilac, Iessiênin and Augusto De Campos) and Singing Word (Toquinho and Belchior): Stylistical Aspects of the Poem and the Song in Literature and Brazilian Popular Music (MPB)”. Per Musi, no. 29, June 2014, pp. 1-17, https://periodicos.ufmg.br/index.php/permusi/article/view/39199.