D. Zhang, Z. Shi, H. J. Yue, G. H. Li, S. H. Feng, “Hydrothermal synthesis and structural characterization of novel organically templated zincophosphites: [H2mpipe]·[Zn3(HPO3)4] and [H2en]1.5·[Zn4.5(HPO3)6]. (mpipe = 1-methylpiperazine and en = ethylenediamine)”, Inorganica Chimica Acta, 2005, 358, 265-270.