@article{SMJ2_2008_34_1_a4,
     author = {Nier, F.},
     title = {Accurate {WKB} {Approximation} for a {1D} {Problem} with {Low} {Regularity}},
     journal = {Serdica Mathematical Journal},
     pages = {113--126},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2008_34_1_a4/}
}