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Rincon, Paul. „‘Earliest writing’ found in China”, BBC News, 2003. április 17. (Hozzáférés: 2012. január 4.) „Signs carved into 8,600-year-old tortoise shells found in China may be the earliest written words, say archaeologists”
„Ancient writing found in Turkmenistan”, BBC, 2001. május 15. (Hozzáférés: 2008. március 30.) „A previously unknown civilisation was using writing in Central Asia 4,000 years ago, hundreds of years before Chinese writing developed, archaeologists have discovered. An excavation near Ashgabat, the capital of Turkmenistan, revealed an inscription on a piece of stone that seems to have been used as a stamp seal.”
Briggs, Helen. „‘Oldest’ New World writing found”, BBC, 2006. szeptember 14. (Hozzáférés: 2008. március 30.) „Ancient civilisations in Mexico developed a writing system as early as 900 BC, new evidence suggests.”
Chandler, Daniel (1993). „Writing strategies and writers' tools”. English Today: The International Review of the English Language9 (2), 32–38. o. DOI:10.1017/S0266078400000341.
Rodríguez Martínez, Maria del Carmen (2006). „Oldest Writing in the New World”. Science313 (5793), 1610–1614. o. DOI:10.1126/science.1131492. PMID16973873. (Hozzáférés: 2008. március 30.) „A block with a hitherto unknown system of writing has been found in the Olmec heartland of Veracruz, Mexico. Stylistic and other dating of the block places it in the early first millennium before the common era, the oldest writing in the New World, with features that firmly assign this pivotal development to the Olmec civilization of Mesoamerica.”
Rodríguez Martínez, Maria del Carmen (2006). „Oldest Writing in the New World”. Science313 (5793), 1610–1614. o. DOI:10.1126/science.1131492. PMID16973873. (Hozzáférés: 2008. március 30.) „A block with a hitherto unknown system of writing has been found in the Olmec heartland of Veracruz, Mexico. Stylistic and other dating of the block places it in the early first millennium before the common era, the oldest writing in the New World, with features that firmly assign this pivotal development to the Olmec civilization of Mesoamerica.”
Wilford, John Noble. „Writing May Be Oldest in Western Hemisphere”, New York Times, 2006. szeptember 15. (Hozzáférés: 2008. március 30.) „A stone slab bearing 3,000-year-old writing previously unknown to scholars has been found in the Mexican state of Veracruz, and archaeologists say it is an example of the oldest script ever discovered in the Western Hemisphere.”
sciencemag.org
Rodríguez Martínez, Maria del Carmen (2006). „Oldest Writing in the New World”. Science313 (5793), 1610–1614. o. DOI:10.1126/science.1131492. PMID16973873. (Hozzáférés: 2008. március 30.) „A block with a hitherto unknown system of writing has been found in the Olmec heartland of Veracruz, Mexico. Stylistic and other dating of the block places it in the early first millennium before the common era, the oldest writing in the New World, with features that firmly assign this pivotal development to the Olmec civilization of Mesoamerica.”
