@article{JRAM_1983__345_152576,
     author = {Peter Sj\"ogren},
     title = {Fatou theorems and maximal functions for eigenfunctions of the {Laplace-Beltrami} operator in a bidisk.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {93--110},
     publisher = {mathdoc},
     volume = {345},
     year = {1983},
     zbl = {0512.43005},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1983__345_152576/}
}