Xue, Y. et al. 2013. A Novel Inorganic-Organic Hybrid Material Based on Monosubstituted Keggin-Type Polyoxometalates by a Metal-Nitrogen of Covalent Bonding. Asian Journal of Chemistry. 25, 9 (Apr. 2013), 4893–4896. DOI:https://doi.org/10.14233/ajchem.2013.14137.