Case Marking and Linguistic Geography ( pp. 67-90 ) . Christa König (2011) · In Geographical Typology and Linguistic Areas: With Special Reference to Africa edited by Osamu Hieda and Christa König and Hirosi Nakagawa · John Benjamins Publishing Company

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Sociolinguistic survey report of Tirma, Chai, Baale and Mursi ( pp. 3 ) . Dimmendaal, Gerrit Jan (2002) · SIL electronic survey reports (SILESR), #2002-033 · SIL International http://www-01.sil.org/silesr/2002/033/SILESR2002-033.pdf

Baale language ( pp. 423-424 ch. B: Baale ) . Gerrit J. Dimmendaal (2003) · In Encyclopaedia Aethiopica: A-C edited by Siegbert Uhlig, et al. · Wiesbaden: Otto Harrassowitz Verlag http://www.harrassowitz-verlag.de/title_597.ahtml

Baale ethnography ( pp. 424-425 ch. B: Baale ) . Jon G. Abbink (2003) · In Encyclopaedia Aethiopica: A-C edited by Siegbert Uhlig, et al. · Wiesbaden: Otto Harrassowitz Verlag http://www.harrassowitz-verlag.de/title_597.ahtml

Notes on Baale ( pp. 273-317 ch. Part III Southwestern Surmic ) . Yigezu, Moges, and Gerrit J. Dimmendaal (1998) · In Surmic languages and cultures Nilo-Saharan Vol 13 · edited by Gerrit J. Dimmendaal and Marco Last · Köln: Rüdiger Köppe Verlag https://www.koeppe.de/titel_details.php?id=260

Convergence of Baale: a Southwest Surmic language to the Southeast Surmic group, lexical evidence ( pp. 49-66 ) . Moges Yigezu (2005) · Annual Publication in African Linguistics. 3 Köln: Rüdiger Köppe

Areal diffusion versus genetic inheritance: An African perspective ( pp. Oxford: Oxford University Press ) . Gerrit J. Dimmendaal (2001) · In Areal Diffusion and Genetic Linguistics. Problems in Comparative Linguistics edited by Alexandra Y. Aikhenvald and R.M.W. Dixon ·

Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·