@article{AIHPC_2014__31_6_1109_0,
     author = {Clason, Christian and Kunisch, Karl},
     title = {Multi-bang control of elliptic systems},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1109--1130},
     publisher = {Elsevier},
     volume = {31},
     number = {6},
     year = {2014},
     doi = {10.1016/j.anihpc.2013.08.005},
     mrnumber = {3280062},
     zbl = {1304.49014},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2013.08.005/}
}