Artola Kortajarena, K. “Erroibarko Aldaeraren Inguruan (4 – Ipar Esteribarko Azpialdaera) [About the Erro Variety (4 - Sub-Variety from the North of Esteribar)]”. Fontes Linguae Vasconum, no. 123, June 2017, pp. 115-66, doi:10.35462/flv123.5.