@article{bwmeta1.element.desklight-0afa941f-3090-48bc-b714-831f5e3eeb55,
author = {Harvey Rosen},
title = {Spanning disks for domains with free fundamental groups},
journal = {Colloquium Mathematicae},
volume = {38},
year = {1977},
pages = {69-72},
zbl = {0374.55002},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-0afa941f-3090-48bc-b714-831f5e3eeb55}
}
Harvey Rosen. Spanning disks for domains with free fundamental groups. Colloquium Mathematicae, Tome 38 (1977) pp. 69-72. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-0afa941f-3090-48bc-b714-831f5e3eeb55/