Pampaneto, el monasterio de San Fructuoso y su influencia en la organizaicón del valle riojano del río Leza, baja la monarquía pamplonesa (siglos X y XI) (Pampaneto, the monastery of the Saint Fructuoso and his influence in the organization of the Rioja valley of the river Leza, during the monarchy of Pamplona (10th and 11th centuries)