Hua, Quan; Barbetti, Mike; Rakowski, Andrzej Z. (2013). "Atmospheric Radiocarbon for the Period 1950–2010". Radiocarbon. 55 (4): 2059-2072. doi:10.2458/azu_js_rc.v55i2.16177. ISSN0033-8222.
Hua, Quan; Barbetti, Mike; Rakowski, Andrzej Z. (2013). "Atmospheric Radiocarbon for the Period 1950–2010". Radiocarbon. 55 (4): 2059-2072. doi:10.2458/azu_js_rc.v55i2.16177. ISSN0033-8222.