@article{Crandall_1983,
    doi = {10.1090/s0002-9947-1983-0690039-8},
    url = {https://doi.org/10.1090%2Fs0002-9947-1983-0690039-8},
    year = {1983},
    publisher = {American Mathematical Society ({AMS})},
    volume = {277},
    number = {1},
    pages = {1--42},
    author = {Michael G. Crandall and Pierre-Louis Lions},
    title = {Viscosity solutions of Hamilton-Jacobi equations},
    journal = {Transactions of the American Mathematical Society}
}

@article{Crandall_1983, doi = {10.1090/s0002-9947-1983-0690039-8}, url = {https://doi.org/10.1090%2Fs0002-9947-1983-0690039-8}, year = {1983}, publisher = {American Mathematical Society ({AMS})}, volume = {277}, number = {1}, pages = {1--42}, author = {Michael G. Crandall and Pierre-Louis Lions}, title = {Viscosity solutions of Hamilton-Jacobi equations}, journal = {Transactions of the American Mathematical Society} }