@article{AFM_2012_37_1_a15,
     author = {Antti Rasila and Jarno Talponen},
     title = {Convexity properties of quasihyperbolic balls on {Banach} spaces},
     journal = {Annales Fennici Mathematici},
     pages = {215--228},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {2012},
     doi = {10.5186/aasfm.2012.3719},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2012.3719/}
}