@article{AFM_2003_28_1_a9,
     author = {Alan F. Beardon},
     title = {The hyperbolic metric in a rectangle {II}},
     journal = {Annales Fennici Mathematici},
     pages = {143--152},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2003_28_1_a9/}
}