^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (編). Gardiol. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (編). Vivaro-Alpine Occitan. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.