Weak ferromagnetism caused by a 2D effect in two new cobalt(II)-and nickel(II)-1,2-bis(4-pyridyl)ethane (bpa) polynuclear compounds

1. De La Pinta, N.
2. Madariaga, G.
3. Lezama, L.
4. Fidalgo, M.L.
5. Cortés, R.