33. Octahedron-shaped three-shell Ln14-substituted polyoxotungstogermanates encapsulating a W4O15 cluster: luminescence  and 

frequency dependent magnetic properties

Y. J. Wang, S. Y. Wu, Y. Q. Sun,* X. X. Li, S. T. Zheng* Chem. Commun. 2019, 55, 2857-2860.