@article{01334338,
title = {Linear flow in porous media with double periodicity.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {56},
year = {1999},
pages = {221-238},
zbl = {0936.35129},
language = {en},
url = {http://dml.mathdoc.fr/item/01334338}
}
Bunoiu, R.; Saint Jean Paulin, Jeannine. Linear flow in porous media with double periodicity.. Portugaliae Mathematica. Nova Série, Tome 56 (1999) pp. 221-238. http://gdmltest.u-ga.fr/item/01334338/