C. Papadimitriou et al., THE PREPARATION AND X-RAY STRUCTURE OF [HO(OXAM)(3)(H2O)(3)](4)CENTER-DOT-2.75H(2)O, Inorganica Chimica Acta, 267(2), 1998, pp. 299-303
The reaction of Ho3+ with oxamic acid yields the title compound which
contains nine-coordinate holmium centres linked into sheets via H-bond
ing networks. (C) 1998 Elsevier Science S.A.