@article{GDZPPN002208148,
title = {Reaction-diffusion systems with time delays: monotonicity, invariance, comparison and convergence.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {416},
year = {1991},
pages = {1-35},
zbl = {0709.35059},
url = {http://dml.mathdoc.fr/item/GDZPPN002208148}
}
Martin, R.H. jr.; Smith, H.L. Reaction-diffusion systems with time delays: monotonicity, invariance, comparison and convergence.. Journal für die reine und angewandte Mathematik, Tome 416 (1991) pp. 1-35. http://gdmltest.u-ga.fr/item/GDZPPN002208148/