@book{400490, title = {Wissenschaftlehre}, series = {GDML\_Books}, publisher = {J.E. v Seidel}, address = {Sulzbach}, year = {1837}, language = {de}, url = {http://dml.mathdoc.fr/item/400490} }
Bolzano, Bernard. Wissenschaftlehre. GDML_Books (1837), http://gdmltest.u-ga.fr/item/400490/