Lewis, M. J. T., “Railways in the Greek and Roman world”Arxivat 2011-07-21 a Wayback Machine., en Guy, A. / Rees, J. (eds), Early Railways. A Selection of Papers from the First International Early Railways Conference (2001), pp. 8-15 (11) (en anglès)
Lewis, M. J. T., “Railways in the Greek and Roman world”Arxivat 2011-07-21 a Wayback Machine., en Guy, A. / Rees, J. (eds), Early Railways. A Selection of Papers from the First International Early Railways Conference (2001), pp. 8-15 (11) (en anglès)