A topological proof of Grushko's theorem on free products.
Stallings, John R.
Mathematische Zeitschrift, Tome 87 (1965), p. 1-8 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1965-01-01
EUDML-ID : urn:eudml:doc:170458 
@article{GDZPPN002396378,
     title = {A topological proof of Grushko's theorem on free products.},
     journal = {Mathematische Zeitschrift},
     volume = {87},
     year = {1965},
     pages = {1-8},
     zbl = {0135.04603},
     url = {http://dml.mathdoc.fr/item/GDZPPN002396378}
}

Stallings, John R. A topological proof of Grushko's theorem on free products.. Mathematische Zeitschrift, Tome 87 (1965) pp. 1-8. http://gdmltest.u-ga.fr/item/GDZPPN002396378/