@article{KJM_2003_25_a14,
     author = {Miodrag Mateljevi\'c},
     title = {Ahlfors-Schwarz lemma and curvature},
     journal = {Kragujevac Journal of Mathematics},
     pages = {155 },
     publisher = {mathdoc},
     volume = {25},
     year = {2003},
     zbl = {1053.30012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2003_25_a14/}
}