Russell R. Aldersson and Lisa J. McEntee-Atalianis. 2007. A Lexical Comparison of Icelandic Sign Language and Danish Sign Language. Birkbeck Studies in Applied Linguistics 2 Icelandic & Danish Sign Languages
Ciupek-Reed, Julia. 2012. Participatory methods in sociolinguistic sign language survey: A case study in El Salvador. University of North Dakota MA thesis. Ciupek-Reed's thesisArchiviato il 26 marzo 2014 in Internet Archive.
web.archive.org
Ciupek-Reed, Julia. 2012. Participatory methods in sociolinguistic sign language survey: A case study in El Salvador. University of North Dakota MA thesis. Ciupek-Reed's thesisArchiviato il 26 marzo 2014 in Internet Archive.
Costituzione - Articolo 6 comma 1 (PDF), su archive.kubatana.net. URL consultato il 21 maggio 2014 (archiviato dall'url originale il 3 marzo 2016).