@inbook{book/327, author = {Loria Gino}, title = {$\Beta$. Bolzano}, booktitle = {Istoria ton Mathematikon}, series = {GDML\_Books}, publisher = {$\Epsilon$.$\Mu$.$\Epsilon$.}, year = {1972}, url = {http://dml.mathdoc.fr/item/book/327} }
Loria Gino. Β. Bolzano, dans Ιστορία των Μαθηματικών, GDML_Books, (1972), . http://gdmltest.u-ga.fr/item/book/327/