@article{Sontag:1979,
    title = {On the Observability of Polynomial Systems, I: Finite-Time Problems},
    volume = {17},
    issn = {1095-7138},
    url = {http://dx.doi.org/10.1137/0317011},
    doi = {10.1137/0317011},
    number = {1},
    journal = {SIAM Journal on Control and Optimization},
    publisher = {Society for Industrial & Applied Mathematics (SIAM)},
    author = {Sontag, Eduardo D.},
    year = {1979},
    month = {jan},
    pages = {139--151},
    date-added = {2024-2-26 17:0:54 +0100}
}

@article{Sontag:1979, title = {On the Observability of Polynomial Systems, I: Finite-Time Problems}, volume = {17}, issn = {1095-7138}, url = {http://dx.doi.org/10.1137/0317011}, doi = {10.1137/0317011}, number = {1}, journal = {SIAM Journal on Control and Optimization}, publisher = {Society for Industrial & Applied Mathematics (SIAM)}, author = {Sontag, Eduardo D.}, year = {1979}, month = {jan}, pages = {139--151}, date-added = {2024-2-26 17:0:54 +0100} }