@article {entry1a,
author = {Smith and Johnson and Doe},
year = 2005
}

@article {entry1b,
author = {Smith and Johnson and Doe},
year = 2005
}

@article {entry2a,
author = {Smith and Koe and Edwards},
year = 2005
}

@article {entry2b,
author = {Smith and Koe and Edwards},
year = 2005
}

@article{A,
author={A and B and C and D and E and F and G},
year={2007},
}

@article{B,
author={A and X and Y},
year={2008},
}

@article{C,
author={A and B and C and D and E and F and G},
year={2009},
}
