Proehl, H., Toerker, M., Sellam, F., Fritz, T., Leo, K., Simpson, C., & Müllen, K. (2001). Comparison of Ultraviolet Photoelectron Spectroscopy and Scanning Tunneling Spectroscopy Measurements on Highly Ordered Ultrathin Films of Hexa-peri-hexabenzocoronene on Au (111). Physical Review B, 63:.