@article{10_1017_S0017089500007722,
     author = {Armitage, D. H.},
     title = {A uniqueness theorem for harmonic functions on half-spaces},
     journal = {Glasgow mathematical journal},
     pages = {189--191},
     year = {1989},
     volume = {31},
     number = {2},
     doi = {10.1017/S0017089500007722},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007722/}
}