@article{GDZPPN002298775,
title = {Immersion of Open Riemann Surfaces.},
journal = {Mathematische Annalen},
volume = {174},
year = {1967},
pages = {103-108},
zbl = {0179.11402},
url = {http://dml.mathdoc.fr/item/GDZPPN002298775}
}
NARASIMHAN, R.; GUNNING, R.C. Immersion of Open Riemann Surfaces.. Mathematische Annalen, Tome 174 (1967) pp. 103-108. http://gdmltest.u-ga.fr/item/GDZPPN002298775/