- ↑ 1,0 1,1 http://global.britannica.com/place/Danube-River
- ↑ 2,0 2,1 https://www.limpopo.riverawarenesskit.org/LIMPOPORAK_COM/EN/GOVERNANCE/TRANSBOUNDARY_WATER_MANAGEMENT/BASIN_ORGANISATIONS/DANUBE_RIVER.HTM
- ↑ 3,0 3,1 Ionita M., C -A Badaluta, Scholz P., Chelcea S. Vanishing river ice cover in the lower part of the Danube basin - signs of a changing climate. (англ.) // Scientific Reports — Macmillan Publishers, NPG, 2018. — Vol. 8, Iss. 1. — P. 7948. — ISSN 2045-2322 — doi:10.1038/S41598-018-26357-W — PMID:29784952