@article{MS2_1974__34_166365,
     author = {Per W. Karlsson},
     title = {Regions of {Convergence} for {Hypergeometric} {Series} in {Three} {Variables.}},
     journal = {Mathematica Scandinavica},
     pages = {241--248},
     publisher = {mathdoc},
     volume = {34},
     year = {1974},
     zbl = {0289.33008},
     url = {http://geodesic.mathdoc.fr/item/MS2_1974__34_166365/}
}