Sumerian lexicon. Version 3.0: http://www.sumerian.org/sumerian.pdf ; Labat, R. & F. Malbran-Labat. 1988. Manuel d'epigraphie akkadienne. Signes, syllabaire, idéogrammes. Paris: Librairie Orientaliste Paul Geuthner, S.A.; The Pennsylvania Sumerian Dictionary: http://psd.museum.upenn.edu/epsd/ ; Thomsen, Marie-Louise. 1984. The Sumerian language. An introduction to its history and grammatical structure. Copenhagen: Academic Press. / Final version with data provided by Thomas Goldammer.