@book{bar1,
    author = "Smith, Jane",
    title = "An example book",
    year = "2019"
}

@book{exbook,
    author = "Smith, Jane",
    title = "Another example book",
    year = "2019"
}

@article{foo1,
    author = "Doe, John",
    title = "An example article",
    year = "2020"
}

@inproceedings{baz1,
    author = "Johnson, Alice",
    title = "An example conference paper",
    year = "2020"
}
