@article{00697124,
title = {Maximum principles for parabolic systems coupled in both first-order and zero-order terms.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {17},
year = {1994},
pages = {813-816},
doi = {10.1155/S0161171294001134},
zbl = {0870.35016},
language = {en},
url = {http://dml.mathdoc.fr/item/00697124}
}
Zhou, Chiping. Maximum principles for parabolic systems coupled in both first-order and zero-order terms.. International Journal of Mathematics and Mathematical Sciences, Tome 17 (1994) pp. 813-816. doi : 10.1155/S0161171294001134. http://gdmltest.u-ga.fr/item/00697124/