Dahl, L. F.; Wampler, D. L. The crystal structure of α-niobium tetraiodide. Acta Crystallographica (International Union of Crystallography (IUCr)). 1962-09-01, 15 (9): 903–911. ISSN 0365-110X. doi:10.1107/s0365110x62002340.
Haynes, William M.; Lide, David R.; Bruno, Thomas J. CRC handbook of chemistry and physics : a ready-reference book of chemical and physical data.. Boca Raton, Florida. 2017: 76. ISBN 978-1-4987-5429-3. OCLC 957751024.
Dahl, L. F.; Wampler, D. L. The crystal structure of α-niobium tetraiodide. Acta Crystallographica (International Union of Crystallography (IUCr)). 1962-09-01, 15 (9): 903–911. ISSN 0365-110X. doi:10.1107/s0365110x62002340.