@article{AFM_1982_7_1_a5,
     author = {Sakari Toppila},
     title = {On {Nevanlinna's} proximity function},
     journal = {Annales Fennici Mathematici},
     pages = {59--64},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1982},
     doi = {10.5186/aasfm.1982.0710},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1982.0710/}
}