Harrison WT, Yeates RM, Phillips ML, Nenoff TM. New framework connectivity patterns in templated networks: the creatinine zinc phosphites C4N3OH7.ZnHPO3, C4N3OH7.Zn(H2O)HPO3, and (C4N3OH7)2.ZnHPO3.H2O. Inorg Chem. 2003 Mar 10; 42(5):1493-8.