Nolting, D. D.; Messerle, L. (2014). "Octahedral Hexatungsten Halide Clusters". Inorganic Syntheses: Volume 36. Vol. 36. pp. 19–23. doi:10.1002/9781118744994.ch4. ISBN 9781118744994. {{cite book}}: |journal= ignored (help) 9781118744994 ↩