1. La focalizzazione in Somalo;Ajello,1995
2. Focus constructions in Ewe and Akan: A comparative perspective;Ameka,1992
3. Focalisation et antifocus;Bearth,1986
4. Constitutent structure, natural focus hierarchy and focus types in Toura;Bearth;Folia linguistica,1992
5. Sein und Haben. Kuwa na kutokuwa;Bearth,1995