@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/