@article{make,
author={John Smith and  Dave and Roger},
title={How to make snacks},
journal={Snack Journal},
year = 2006,
doi={10.10.10.10}
}

@article{sell,
author={John Smith and  Dave and Roger},
title={How to sell snacks},
journal={Snack Journal},
year = 2012,
doi={10.10.10.10}
}

@article{sold,
author={John Smith and Edgard},
title={How to advertise snacks},
journal={Snack Journal},
year = 2013,
doi={10.10.10.10}
}