Sur le traitement de u devant le groupe "r plus consonne" en souletin

The "u" is converted into "ü" before a strong "r" and it is maintained in "u" before a soft "r". The study of the "u" in Soule should be made taking into account the lower Navarran dialect from Mixe and that of Bardos which is a dialectal variety of eastern lower Navarran Basque