@article{GDZPPN002223953,
title = {A Phragm\'en - Lindel\"of Principle for Subsolutions of Quasi - Linear Equations.},
journal = {Manuscripta mathematica},
volume = {35},
year = {1981},
pages = {355-365},
zbl = {0506.35033},
url = {http://dml.mathdoc.fr/item/GDZPPN002223953}
}
Granlund, Seppo. A Phragmén - Lindelöf Principle for Subsolutions of Quasi - Linear Equations.. Manuscripta mathematica, Tome 35 (1981) pp. 355-365. http://gdmltest.u-ga.fr/item/GDZPPN002223953/