@article{05726995,
title = {On groups and normal polymorphic functions.},
journal = {Revista Colombiana de Matem\'aticas},
volume = {42},
year = {2008},
pages = {167-181},
zbl = {1201.30050},
language = {en},
url = {http://dml.mathdoc.fr/item/05726995}
}
Mejía, Diego; Pommerenke, Christian. On groups and normal polymorphic functions.. Revista Colombiana de Matemáticas, Tome 42 (2008) pp. 167-181. http://gdmltest.u-ga.fr/item/05726995/