CASAS, Carlos Quiles, Fernando López-Menchero Díez. A Grammar of Modern Indo-European [online]. Asociación Cultural Dnghu, July 2007 [cit. 2010-03-03]. Dostupné v archivu pořízeném dne 2010-01-16. ISBN978-84-611-7639-7. The ASCII text used on the web site has been replaced by the Proto-Germanic characters presented in this article.