@article{01960542,
title = {The hyperbolic metric of a rectangle.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {26},
year = {2001},
pages = {401-407},
zbl = {1017.30054},
language = {en},
url = {http://dml.mathdoc.fr/item/01960542}
}
Beardon, A.F. The hyperbolic metric of a rectangle.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 26 (2001) pp. 401-407. http://gdmltest.u-ga.fr/item/01960542/