Defect-originated magnetism in carbon-based and non-traditional inorganic compounds: A new class of magnetic materialsA. N. Andriotis, R. M. Sheetz, E. Richter and M. MenonEurophys. Lett., 72 4 (2005) 658-663DOI: https://doi.org/10.1209/epl/i2005-10276-x