@article{NUMA_1973__21_132230,
     author = {P. Lesaint},
     title = {Finite {Element} {Methods} for {Symmetric} {Hyperbolic} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {244--255},
     year = {1973},
     volume = {21},
     zbl = {0283.65061},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132230/}
}