Berro Urrizelki, A., Fernández Fernández, B., & Orbegozo Arrizabalaga, I. (2017). Euskara Bariazioan / Basque in Variation (BiV): lehen urratsak. Fontes Linguae Vasconum, (123), 7-28. https://doi.org/10.35462/flv123.1