@article{SEDP_1979-1980____A2_0,
     author = {Eskin, G.},
     title = {Well-posedness and propagation of singularities for initial boundary value problem for second order hyperbolic equation with general boundary condition},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:2},
     pages = {1--14},
     year = {1979-1980},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     mrnumber = {600686},
     language = {en},
     url = {https://www.numdam.org/item/SEDP_1979-1980____A2_0/}
}