found: Ethnologue:p. 87 (Pauserna (Pau Cerne, Guarayu-Ta, Pauserna-Guarasug'we) Tupi. Bolivia)
found: Loukotka, C. Class. So. Am. Ind. langs.:p. 373.
found: Voegelin lang.:p. 337 (Pauserna (Guarayu-Ta) Bolivia. Tupi)
found: Diccionario flora y fauna Guarasu, 2015: page 1 (Guarasu language; Guarasu ñe'e)
found: Wikipedia, viewed Jun 8, 2022: (heading: Warázu language; variants: Pauserna, Guarasugwé, Guarasú'we)
found: Ethnologue, viewed online August 1, 2022:Pauserna (alternate names: Guarasugwé, Guarasú'we, Guarayu-Ta, Paucerne, Pauserna-Guarasugwé, Warázu;