Crystal structure of diaqua- bis(1,10-phenanthroline)nickel(II)thiophene-2,5-dicarboxylateoctahydrate,[Ni(H2O)2(C12H8N2)2][C6H2O4S]·8H2O - Wang Xiu-Yan (Zeitschrift für Kristallographie - New Crystal Structures, 2009)