@article{01780404,
title = {Opial type },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {30},
year = {2002},
pages = {85-95},
doi = {10.1155/S016117120201311X},
zbl = {1001.26011},
language = {en},
url = {http://dml.mathdoc.fr/item/01780404}
}
Anastassiou, G.A.; Koliha, J.J.; Peǎrić, J. Opial type . International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 85-95. doi : 10.1155/S016117120201311X. http://gdmltest.u-ga.fr/item/01780404/