BARN definition and meaning | Collins English Dictionary [online]. www.collinsdictionary.com, 2026-03-03, [cit. 2026-03-07]. Dostupné online. (po anglicky)
CHEMISTRY (IUPAC), The International Union of Pure and Applied. IUPAC - barn (B00598) [online]. goldbook.iupac.org, [cit. 2026-03-07]. DOI: 10.1351/goldbook.B00598. Dostupné online. (po anglicky)