Koethe, T.C., Hu, Z., Haverkort, M.W., Schüßler-Langeheine, C., Venturini, F., Brookes, N.B., Tjernberg, O., Reichelt, W., Hsieh, H.H., Lin, H.J., Chen, C.T. and Tjeng, L.H. (2006) Transfer of Spectral Weight and Symmetry across the Metal-Insulator Transition in VO2. Physical Review Letters, 97, Article ID: 116402.