Scott, Peter Adamson; Roberts, Gilbert (1958). "The Volta Bridge". Proceedings of the Institution of Civil Engineers. 9 (4). Proceedings of the Institution of Civil Engineers, E-ISSN 1753-7789, Volume 9, Issue 4, April 1958, pp. 395-432: 395–432. doi:10.1680/iicep.1958.2304. Retrieved 2 August 2020.
Scott, Peter Adamson; Roberts, Gilbert (1958). "The Volta Bridge". Proceedings of the Institution of Civil Engineers. 9 (4). Proceedings of the Institution of Civil Engineers, E-ISSN 1753-7789, Volume 9, Issue 4, April 1958, pp. 395-432: 395–432. doi:10.1680/iicep.1958.2304. Retrieved 2 August 2020.