message: docs: linkfix in bibliography
  The [current link](https://arxiv.org/pdf/1808.01752) goes to a
  random unrelated paper.
diff: year = {2003},
  pages = {363--370},
  publisher = {Springer},
  - url = {https://arxiv.org/pdf/1808.01752}
  + url = {https://doi.org/10.1007/3-540-45103-X_50},
  + doi = {10.1007/3-540-45103-X_50}
  }
  @inproceedings{Farsiu03,
  author = {Farsiu, Sina and Robinson, Dirk and Elad, Michael and Milanfar, Peyman},
  