@article{PORMA_1972__31_1_115159,
     author = {Schleusner, John},
     title = {Note on some characteristic properties of functions of the second kind},
     journal = {Portugaliae mathematica},
     pages = {13--19},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1972},
     mrnumber = {0304733},
     zbl = {0252.33011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1972__31_1_115159/}
}