@inbook{400083,
     title = {Bolzano's ``Functionenlehre''},
     booktitle = {Bolzano and the Foundations of Mathematical Analysis},
     series = {GDML\_Books},
     publisher = {Society of Czechoslovak Mathematicians and Physicists},
     address = {Praha},
     year = {1981},
     pages = {43-66},
     url = {http://dml.mathdoc.fr/item/400083}
}