@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/