@article{EP_1997_2_a7,
     author = {Axel Osses and Jean-Pierre Puel},
     title = {Some extensions of approximate controllability results to inverse problems},
     journal = {ESAIM. Proceedings},
     pages = {133--143},
     publisher = {mathdoc},
     volume = {2},
     year = {1997},
     doi = {10.1051/proc:1997017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc:1997017/}
}