@article{10_4064_ap99_2_5,
     author = {Cai-Feng Yi and Yu Wang and Hong-Yan Xu},
     title = {An improvement of {Hayman's} inequality
 on an angular domain},
     journal = {Annales Polonici Mathematici},
     pages = {181--192},
     publisher = {mathdoc},
     volume = {99},
     number = {2},
     year = {2010},
     doi = {10.4064/ap99-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap99-2-5/}
}