@inbook{book/52,
author = {Loria Gino},
title = {E theoria ton konikon tomon eis ta <<Principia>>},
booktitle = {Istoria ton Mathematikon},
series = {GDML\_Books},
publisher = {$\Epsilon$.$\Mu$.$\Epsilon$.},
year = {1972},
url = {http://dml.mathdoc.fr/item/book/52}
}
Loria Gino. Η θεωρία των κωνικών τόμων είς τα «Principia», dans Ιστορία των Μαθηματικών, GDML_Books, (1972), . http://gdmltest.u-ga.fr/item/book/52/