@article{Allen_1994,
    doi = {10.1016/0025-5564(94)90025-6},
    url = {https://doi.org/10.1016%2F0025-5564%2894%2990025-6},
    year = {1994},
    month = {nov},
    publisher = {Elsevier {BV}},
    volume = {124},
    number = {1},
    pages = {83--105},
    author = {Linda J.S. Allen},
    title = {Some discrete-time {SI}, {SIR}, and {SIS} epidemic models},
    journal = {Mathematical Biosciences}
}

@article{Allen_1994, doi = {10.1016/0025-5564(94)90025-6}, url = {https://doi.org/10.1016%2F0025-5564%2894%2990025-6}, year = {1994}, month = {nov}, publisher = {Elsevier {BV}}, volume = {124}, number = {1}, pages = {83--105}, author = {Linda J.S. Allen}, title = {Some discrete-time {SI}, {SIR}, and {SIS} epidemic models}, journal = {Mathematical Biosciences} }