@article{10_1007_s10778_006_0111_2,
     author = {Zhang, Ping},
     title = {Weak solutions to a nonlinear variational wave equation and some related problems},
     journal = {Applications of Mathematics},
     pages = {427--466},
     publisher = {mathdoc},
     volume = {51},
     number = {4},
     year = {2006},
     doi = {10.1007/s10778-006-0111-2},
     mrnumber = {2291780},
     zbl = {1164.35330},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10778-006-0111-2/}
}