@article{CRMATH_2009__347_3-4_147_0,
     author = {Cannarsa, Piermarco and Martinez, Partick and Vancostenoble, Judith},
     title = {Carleman estimates and null controllability for boundary-degenerate parabolic operators},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {147--152},
     publisher = {Elsevier},
     volume = {347},
     number = {3-4},
     year = {2009},
     doi = {10.1016/j.crma.2008.12.011},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2008.12.011/}
}