Monday B. Abasiattai (1989), "The Oberi Okaime Christian mission: Towards a history of an Ibibio independent church", in Africa: Journal of the International African Institute, 59: 496-516.
Dafydd Gibbon, Moses Ekpenyong & Eno-Abasi Urua (2010), "Medefaidrin: Resources documenting the birth and death language life-cycle", in Proceedings of the Seventh conference on International Language Resources and Evaluation (LREC'10), May19–21, Valletta, Malta, ISBN2-9517408-6-7.
Dafydd Gibbon & Eno-Abasi Urua (2009), "Preserving and understanding the Medefaidrin language (of the Obɛri Ɔkaimɛ ('Church freely given') Ibibio community)" WOCAL 6, Cologne.
Kathleen Hau (1961), "Oberi Okaime script, texts and counting systems", in: Bulletin de l'Institut Francais d'Afrique Noire. Série B, Sciences humaines, 23: 291-308.
Eno-Abasi Urua (2008), Medefidrin, the 'Spirit' language of the 1920s in Ibibio land
