found: Work cat.: 94-60051: Wiering, E. The Doyayo language, 1994.
found: Ethnologue, 1992:p. 187 (Doyayo (Doohyaayo, Dowayayo, Doyaayo, Doyau, Donyayo, Donyanyo, Doayo, Dooyayo, Dooyaayo, Dowayo, Doowaayo, Tunga, Tuuno, Tungbo, Nomai; "Namshi" is a derogatory term)
found: Intl. encyc. of linguistics, 1992:v. 1, p. 21 (Dowayo; Doohyaayo, Dowayayo, Doojaayo, Doyayo, Donyanyo, Doayu, Tunga, Tuuno, Tungbo or Noma)
found: Ruhlen, M. Guide, 1987:p. 306 (Doy-ayo)
found: Voegelin lang.:p. 9 (Doy-ayo, Donyayo, Donyanyo)
found: Mann, M. Thesaurus, 1987:p. 95 (Doyayo; Dowayo, Doy-ayo, etc.)
found: Bender-Samuel, J. Niger-Congo languages, 1989.