@article{1183530215,
author = {Ess\'en, Matts},
title = {A generalization of the Ahlfors-Heins theorem},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 127-131},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530215}
}
Essén, Matts. A generalization of the Ahlfors-Heins theorem. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 127-131. http://gdmltest.u-ga.fr/item/1183530215/