@article{RLIN_2004_9_15_1_a0,
     author = {Anastassiou, George A. and Goldstein, Gis\`ele Ruiz and Goldstein, Jerome A.},
     title = {Multidimensional {Opial} inequalities for functions vanishing at an interior point},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {5--15},
     publisher = {mathdoc},
     volume = {Ser. 9, 15},
     number = {1},
     year = {2004},
     zbl = {1072.26006},
     mrnumber = {1340422},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_2004_9_15_1_a0/}
}