@article{bro-cha-joh-che-93-fran,
  author = {C. A. Brown and P .D. Charles and W. A. Johnsen and S. Chesters},
  title = {Fractal Analysis of Topographic Data by the Patchwork Method},
  journal = {Wear},
  volume = {161},
  pages = {61--67},
  year = 1993
}