@article{GDZPPN002037912,
title = {On Opial-type inequalities in two varaiables.},
journal = {Aequationes mathematicae},
volume = {38},
year = {1989},
pages = {236-244},
zbl = {0684.26006},
url = {http://dml.mathdoc.fr/item/GDZPPN002037912}
}
Cheung, Wing-Sum. On Opial-type inequalities in two varaiables.. Aequationes mathematicae, Tome 38 (1989) pp. 236-244. http://gdmltest.u-ga.fr/item/GDZPPN002037912/