μ-Oxalato-κ4O1,O2:O 1′,O2′-bis[aqua(2,2′-bipyridyl- κ2N,N′)copper(II)] bis(hydrogen squarate)

1. Reinoso, S.
2. Vitoria, P.
3. Felices, L.S.
4. Lezama, L.
5. Gutiérrez-Zorrilla, J.M.