@article{AIHPC_2014__31_3_477_0,
     author = {Phung, Kim Dang and Wang, Lijuan and Zhang, Can},
     title = {Bang-bang property for time optimal control of semilinear heat equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {477--499},
     publisher = {Elsevier},
     volume = {31},
     number = {3},
     year = {2014},
     doi = {10.1016/j.anihpc.2013.04.005},
     mrnumber = {3208451},
     zbl = {1295.49005},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2013.04.005/}
}