@article{BASM_2008_1_a6,
     author = {Ovidiu C\^arj\u{a} and Mihai Necula and Ioan I. Vrabie},
     title = {Orthogonal {Solutions} for a {Hyperbolic} {System}},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {125--130},
     publisher = {mathdoc},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2008_1_a6/}
}