@article{10_4064_ap115_1_7,
     author = {Jun-Fan Chen},
     title = {Normality criteria for families of
 zero-free meromorphic functions},
     journal = {Annales Polonici Mathematici},
     pages = {89--98},
     publisher = {mathdoc},
     volume = {115},
     number = {1},
     year = {2015},
     doi = {10.4064/ap115-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap115-1-7/}
}