@article{JEMS_2013_15_2_a8,
     author = {Kim Dang Phung and Gengsheng Wang},
     title = {An observability estimate for parabolic equations from a measurable set in time and its applications},
     journal = {Journal of the European Mathematical Society},
     pages = {681--703},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2013},
     doi = {10.4171/jems/371},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/371/}
}