@article{10.1016/j.jtbi.2014.11.009,
    doi = {https://doi.org/10.1016/j.jtbi.2014.11.009},
    author = {Wu, X. and Zhu, H.},
    journal = {Journal of theoretical biology},    
    title = {Fast maximum likelihood estimation of mutation rates using a birth-death process},
    year = {2015},
    volume = {366},
    pages={1–7}
}