Semiconductor cluster beams: One and two color ionization studies of Six and Gex - Heath, J. R.; Liu, Yuan; O'Brien, S. C.; Zhang, Qing-Ling; Curl, R. F.; Tittel, F. K.; Smalley, R. E. (American Institute of Physics (AIP), 1985)
http://dx.doi.org/10.1063/1.449673
Keywords: U; V