Hollenstein, U.; Seiler, R.; Osterwalder, A.; Sommavilla, M.; Wüest, A.; Rupper, P.; Willitsch, S.; Greetham, G. M.; Brupbacher-Gatehouse, B.; Merkt, F. High-Resolution Vacuum Ultraviolet Photoelectron Spectroscopy. Chimia 2001, 55, 759.