@article{AIHPC_2015__32_3_519_0,
     author = {Widmayer, Klaus},
     title = {Non-uniqueness of weak solutions to the wave map problem},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {519--532},
     publisher = {Elsevier},
     volume = {32},
     number = {3},
     year = {2015},
     doi = {10.1016/j.anihpc.2014.02.001},
     mrnumber = {3353699},
     zbl = {1320.35006},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2014.02.001/}
}