@inbook{book/47,
     author = {Loria Gino},
     title = {Christiaan Huygens},
     booktitle = {Istoria ton Mathematikon},
     series = {GDML\_Books},
     publisher = {$\Epsilon$.$\Mu$.$\Epsilon$.},
     year = {1972},
     url = {http://dml.mathdoc.fr/item/book/47}
}