Holzer, Stefan M. (2010). "The Polonceau Roof and Its Analysis". International Journal for the History of Engineering & Technology. 80. Newcomen Society: 22–54. doi:10.1179/175812109X12547331530066. S2CID110387074.
Holzer, Stefan M. (2010). "The Polonceau Roof and Its Analysis". International Journal for the History of Engineering & Technology. 80. Newcomen Society: 22–54. doi:10.1179/175812109X12547331530066. S2CID110387074.