Surface electronic structure of Si(111)7×7-Ge and Si(111)5×5-Ge studied with photoemission and inverse photoemissionPer MartenssonWei-Xin Niet al.1987Physical Review B
Surface electronic structure of GaAs(110)1×1-Sb studied with angle-resolved photoelectron spectroscopyP. MrtenssonG.V. Hanssonet al.1986Physical Review B