@article{RSMUP_1998__99__219_0,
     author = {Amadori, Debora and Colombo, Rinaldo M.},
     title = {Viscosity solutions and standard {Riemann} semigroup for conservation laws with boundary},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {219--245},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {99},
     year = {1998},
     mrnumber = {1636611},
     zbl = {0910.35078},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1998__99__219_0/}
}