(EN) Institution of Civil Engineers (Great Britain) e Institute of Marine Engineers and Royal Institution of Naval Architects, Marine Engineering and Shipbuilding Abstracts, Vol. 1-5, p. 75. URL consultato il 7 marzo 2019.
(EN) Andrew Betts Brown, Engineering Facts and Figures, A. Fullerton & Company, 1866, pp. 218-230. URL consultato il 7 marzo 2019.