@article{AFM_1983_8_2_a2,
     author = {Sakari Toppila},
     title = {On the spherical derivative of a meromorphic function with a {Nevanlinna} deficient value},
     journal = {Annales Fennici Mathematici},
     pages = {235--245},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1983},
     doi = {10.5186/aasfm.1983.0825},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1983.0825/}
}