Winterlik, J., Fecher, G. H., Jenkins, C. A., Felser, C., Mühle, C., Doll, K., Jansen, M., Sandratskii, L. M., & Kübler,
J. (2009). Challenge of Magnetism in Strongly Correlated Open-Shell 2p Systems. Physical Review Letters, 102(1):, pp. 1-4. doi:10.1103/PhysRevLett.102.016401.