@article{JRAM_1973__259_151302,
     author = {Mitsuru Nakai and Leo Sario},
     title = {Existence of bounded biharmonic functions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {147--156},
     publisher = {mathdoc},
     volume = {259},
     year = {1973},
     zbl = {0251.31003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__259_151302/}
}