@article{GDZPPN001178261,
title = {Maximum Principles for Linear Difference-Differential Opeartors in Periodic Function Spaces.},
journal = {Numerische Mathematik},
volume = {44},
year = {1984},
pages = {121-140},
zbl = {0509.34070},
url = {http://dml.mathdoc.fr/item/GDZPPN001178261}
}
Zennaro, Marino. Maximum Principles for Linear Difference-Differential Opeartors in Periodic Function Spaces.. Numerische Mathematik, Tome 44 (1984) pp. 121-140. http://gdmltest.u-ga.fr/item/GDZPPN001178261/