@book{PPN593233549,
title = {Grundgesetze der Arithmetik Bd. 2},
series = {GDML\_Books},
publisher = {Pohle},
address = {Jena},
year = {1903},
language = {de},
url = {http://dml.mathdoc.fr/item/PPN593233549}
}
Frege, Friedrich Ludwig Gottlob. Grundgesetze der Arithmetik Bd. 2. GDML_Books (1903), http://gdmltest.u-ga.fr/item/PPN593233549/