Fernánez Planas, Ana Ma., Paolo Roseano, Eugenio Martínez Celdrán, and Lourdes Romera Barrios. 2011. “A Dialectometrical Analysis of Intonation in the Catalan-Speaking Area”. Journal of Experimental Phonetics 20 (September):141-78. https://revistes.ub.edu/index.php/experimentalphonetics/article/view/44319.