Greenwood, N. N.; Earnshaw, A. Chemistry of the Elements 2nd. Oxford:Butterworth-Heinemann. 1997. ISBN 0-7506-3365-4. Seijo, Luis. Ab initio model potential
Perennial. ISBN 0060928786 Hadow, Sir W. H., Richard Wagner, London: T. Butterworth, Ltd., 1934 Hilmes, Oliver, Cosimas Kinder: Triumph und Tragödie der
Richard Stuart. A Short History of Anaesthesia: The First 150 Years. Butterworth-Heinemann. 1996: 39 [2019-05-20]. ISBN 9780750630665. (原始内容存档于2017-05-10)