@inbook{book/271,
author = {Loria Gino},
title = {Pierre Varignon kai merikoi sugkhronoi tou},
booktitle = {Istoria ton Mathematikon},
series = {GDML\_Books},
publisher = {$\Epsilon$.$\Mu$.$\Epsilon$.},
year = {1972},
url = {http://dml.mathdoc.fr/item/book/271}
}
Loria Gino. Pierre Varignon και μερικοί σύγχρονοι του, dans Ιστορία των Μαθηματικών, GDML_Books, (1972), . http://gdmltest.u-ga.fr/item/book/271/