@article{CRMATH_2003__337_4_253_0,
     author = {Ponce, Augusto C.},
     title = {A variant of {Poincar\'e's} inequality},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {253--257},
     publisher = {Elsevier},
     volume = {337},
     number = {4},
     year = {2003},
     doi = {10.1016/S1631-073X(03)00313-3},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/S1631-073X(03)00313-3/}
}