@article{Angeli_2007,
    doi = {10.1016/j.mbs.2007.07.003},
    url = {https://doi.org/10.1016%2Fj.mbs.2007.07.003},
    year = {2007},
    month = {dec},
    publisher = {Elsevier {BV}},
    volume = {210},
    number = {2},
    pages = {598--618},
    author = {David Angeli and Patrick De Leenheer and Eduardo D. Sontag},
    title = {A Petri net approach to the study of persistence in chemical reaction networks},
    journal = {Mathematical Biosciences}
}

@article{Angeli_2007, doi = {10.1016/j.mbs.2007.07.003}, url = {https://doi.org/10.1016%2Fj.mbs.2007.07.003}, year = {2007}, month = {dec}, publisher = {Elsevier {BV}}, volume = {210}, number = {2}, pages = {598--618}, author = {David Angeli and Patrick De Leenheer and Eduardo D. Sontag}, title = {A Petri net approach to the study of persistence in chemical reaction networks}, journal = {Mathematical Biosciences} }