Seven Novel Lanthanide Oxalatophosphonates with Two Types of 3D Framework Structures Based on <i>N</i>-Morpholinomethylphosphonic Acid: Syntheses, Crystal Structures, and Luminescence PropertiesYan‐Yu Zhu, Lan‐Cui Zhang, Zhen‐Gang Sun et al.|Crystal Growth & Design|2009Cited by 45