@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040068,
 author = {Ton, Bui An},
 issue = {4},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {Mar},
 pages = {501--524},
 title = {On an optimal control problem for the wave equation with input on an unknown surface},
 volume = {16},
 year = {2010}
}