@article{art1,
  title = {Article 1},
  author = {{John Doe}},
  year = {1337},
  month = sep,
  journal = {Proceedings of the IEEE},
  volume = {104},
  number = {9},
  pages = {1711--1726},
  doi = {10.1109/XXX}
}

@inproceedings{art2,
  title = {Article 2},
  author = {{Jane Smith}},
  year = {2010},
  month = sep,
  journal = {Proceedings of the Springer},
  volume = {104},
  number = {9},
  pages = {1711--1726},
  doi = {10.1109/XXXY}
}