D. . Rodríguez Estrada, P. . Salazar Gutiérrez, F. P. . Bustamante Salazar, G. . Mandinagoitia, and J. . Barbet i Toribio, “Teaching of the gralla in three different models of teaching / Learning in Barcelona. Spaces of music, training, tradition and identity”, RSarance, no. 47, pp. 64–71, Dec. 2021, doi: 10.51306/ioasarance.047.04.