"Proto-Philippine Phonology." (页面存档备份,存于互联网档案馆) In: Archipel, volume 9, 1975. pp. 29-42. Charles, Mathew. Problems in the Reconstruction of Proto-Philippine
philol.uni-leipzig.de. [2019-05-21]. (原始内容存档于2020-07-13). Bavant, Marc. Proto-Indo-European Ergativity... Still To Be Discussed. Poznań Studies in Contemporary
54 (1): 54-109. Reid, Lawrence A. (2013) "Who Are the Philippine Negritos? Evidence from Language (页面存档备份,存于互联网档案馆)." Human Biology: Vol. 85: Iss. 1, Article