A new paper has been accepted for publication and is now online on Chem. Phys. Chem. website. The article “Diradicals and diradicaloids in Natural Orbital Functional Theory” by Xabier Lopez, Fernando Ruiperez, Mario Piris, Jon M. Matxain and Jesus M. Ugalde can now be accesed at http://dx.doi.org/10.1002/cphc.201100136