@article{GDZPPN001171283, title = {Finite Element Methods for Symmetric Hyperbolic Equations.}, journal = {Numerische Mathematik}, volume = {21}, year = {1973}, pages = {244-255}, zbl = {0283.65061}, url = {http://dml.mathdoc.fr/item/GDZPPN001171283} }
Lesaint, P. Finite Element Methods for Symmetric Hyperbolic Equations.. Numerische Mathematik, Tome 21 (1973) pp. 244-255. http://gdmltest.u-ga.fr/item/GDZPPN001171283/