Keilmann, Fritz Laboratory for Attosecond Physics, Max Planck Institute of Quantum Optics, Max Planck Society;
Frenzel, A., Qazilbash, M. M., Brehm, M., Chae, B. G., Kim, B. J., Kim, H. T., et al. (2009). Inhomogeneous electronic state near the insulator-to-metal transition in the correlated oxide VO2. Physical Review B, 80(11): 115115. doi:10.1103/PhysRevB.80.115115.