 @ARTICLE{Cesar2013,
  author = {Jean Cesar},
  title = {An amazing title},
  year = {2013},
  volume = {12},
  journal = {Nice Journal}
}

    @ARTICLE{Cesar2014,
  author = {Jean Cesar},
  title = {An amazing title},
  year = {2014},
  volume = {12},
  journal = {Nice Journal}
}