@article{10_4064_cm_11_2_203_207,
     author = {J. Siciak},
     title = {A generalization of {Schwarz's} lemma and of {Hadamard's} three circles theorem},
     journal = {Colloquium Mathematicum},
     pages = {203--207},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1963},
     doi = {10.4064/cm-11-2-203-207},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-11-2-203-207/}
}