@article{GraserHirschfeldKoppetal.2010,
  author    = {Siegfried Graser and P. J. Hirschfeld and Thilo Kopp and R. Gutser and B. M. Andersen and Jochen Mannhart},
  title     = {How grain boundaries limit supercurrents in high-temperature superconductors},
  journal   = {Nature Physics},
  volume    = {6},
  number    = {8},
  pages     = {609 -- 614},
  doi       = {10.1038/nphys1687},
  year      = {2010},
}