Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (编). Yangliu. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.
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Yang, Cathryn. 2010. Lalo regional varieties: Phylogeny, dialectometry, and sociolinguistics. Melbourne: La Trobe University PhD dissertation.[1] (页面存档备份,存于互联网档案馆)