@article{EP_2013_41_a2,
     author = {F. Boyer},
     title = {On the penalised {HUM} approach and its applications to the numerical approximation of null-controls for parabolic problems},
     journal = {ESAIM. Proceedings},
     pages = {15--58},
     year = {2013},
     volume = {41},
     doi = {10.1051/proc/201341002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc/201341002/}
}