Citation: Liu, W.; Chen, H.-H.; Yang, X.X.; Zhao, J.T. (2005). Two novel transition-metal phosphite compounds with 4-, 6- and 12-membered rings: hydrothermal syntheses, crystal structures and magnetic properties of Na2 [M (H P O3)2] (M = Fe, Co). European Journal of Inorganic Chemistry, 2005, pp. 946-951.