text: [24] M. Strange, I. S. Kristensen, K. S. Thygesen, and K. W. Ja- 
  cobsen, “Benchmark density functional theory calculations for 
  nanoscale conductance”, J. Chem. Phys. 128(11), 114714 (Mar. 
  2008), doi:10.1063/1.2839275. 