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Himmel, H.-J.; Linti, G. (2012). "OPN and SPN: Small Molecules with Great Potential". Angewandte Chemie International Edition. 51 (23): 5541–5542. doi:10.1002/anie.201201638. PMID22532508.
Zeng, X.; Beckers, H.; Willner, H. (2011). "Elusive O═P≡N, a Rare Example of Phosphorus σ2λ5-Coordination". Journal of the American Chemical Society. 133 (51): 20696–20699. doi:10.1021/ja2091867. PMID22117167.