Salaberri Zaratiegi, Patxi. 2012. “Euskararen Ekialdeko Mugak, Hegoaldean [The Eastern Limits of Euskara, in the Peninsular Basque Territory]”. Fontes Linguae Vasconum, no. 114 (June), 145-55. https://doi.org/10.35462/flv114.8.