Goriachko, A., et al. “New Features of the Ge(111) Surface With Co-Existing c(2 × 8) and 2 × 2 Reconstructions Investigated by Scanning Tunneling Microscopy”. Ukrainian Journal of Physics, vol. 60, no. 11, Jan. 2019, p. 1132, doi:10.15407/ujpe60.11.1132.