@article{MS2_1978__43_166619,
     author = {G\"oran Wanby},
     title = {A generalization of the {Phragm\'en-Lindel\"of} principle for elliptic differential equations.},
     journal = {Mathematica Scandinavica},
     pages = {259--274},
     publisher = {mathdoc},
     volume = {43},
     year = {1978},
     zbl = {0452.31001},
     url = {http://geodesic.mathdoc.fr/item/MS2_1978__43_166619/}
}