@article{Sankaranarayanan_2007,
    doi = {10.1007/s10703-007-0046-1},
    url = {https://doi.org/10.1007%2Fs10703-007-0046-1},
    year = {2007},
    month = {dec},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {32},
    number = {1},
    pages = {25--55},
    author = {Sriram Sankaranarayanan and Henny B. Sipma and Zohar Manna},
    title = {Constructing invariants for hybrid systems},
    journal = {Formal Methods in System Design}
}

@article{Sankaranarayanan_2007, doi = {10.1007/s10703-007-0046-1}, url = {https://doi.org/10.1007%2Fs10703-007-0046-1}, year = {2007}, month = {dec}, publisher = {Springer Science and Business Media {LLC}}, volume = {32}, number = {1}, pages = {25--55}, author = {Sriram Sankaranarayanan and Henny B. Sipma and Zohar Manna}, title = {Constructing invariants for hybrid systems}, journal = {Formal Methods in System Design} }