@article{Crandall_1984,
    doi = {10.1090/s0002-9947-1984-0732102-x},
    url = {https://doi.org/10.1090%2Fs0002-9947-1984-0732102-x},
    year = {1984},
    publisher = {American Mathematical Society ({AMS})},
    volume = {282},
    number = {2},
    pages = {487--502},
    author = {M. G. Crandall and L. C. Evans and P.-L. Lions},
    title = {Some properties of viscosity solutions of Hamilton-Jacobi equations},
    journal = {Transactions of the American Mathematical Society}
}

@article{Crandall_1984, doi = {10.1090/s0002-9947-1984-0732102-x}, url = {https://doi.org/10.1090%2Fs0002-9947-1984-0732102-x}, year = {1984}, publisher = {American Mathematical Society ({AMS})}, volume = {282}, number = {2}, pages = {487--502}, author = {M. G. Crandall and L. C. Evans and P.-L. Lions}, title = {Some properties of viscosity solutions of Hamilton-Jacobi equations}, journal = {Transactions of the American Mathematical Society} }