@article{AIHPC_2006__23_5_629_0,
     author = {Xu, Yongzhong},
     title = {Note on an inequality},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {629--639},
     publisher = {Elsevier},
     volume = {23},
     number = {5},
     year = {2006},
     doi = {10.1016/j.anihpc.2005.07.002},
     mrnumber = {2259609},
     zbl = {05072654},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2005.07.002/}
}