DNB,http://d-nb.info/gnd/1013476131, 2013-01-13
Information trouvée : Brøndum-Nielsen, Johannes (1881-1944). Philologue danois.
Gustav Wied i breve / Johs. Brøndum-Nielsen, 1946
Internet, http://authorities.loc.gov/, 14/10/2008
Internet, http://www.denstoredanske.dk, 2014-06-27
Information trouvée : Brøndum-Nielsen, Johannes (1881/12/02-1977/03/09).