Tunnel ferroviaire du Saint-Gothard

1. Bory, Paul (1890): Les grandes entreprises modernes. Alfred Mame et Fils, éditeurs, Tours (France), pp. 145-172.
2. Vischer, Daniel (1993): Jean-Daniel Colladon - Spezialist beim Bau des Gotthard-Eisenbahntunnels. Dans: Schweizer Ingenieur und Architekt, v. 111, n. 48 (25 novembre 1993).

   https://doi.org/10.5169/seals-78290

3. The St Gothard Tunnel. Dans: Scientific American, v. 10, n. 235 (3 juillet 1880), pp. 3736-3737.

   https://doi.org/10.1038/scientificamerican07031880-3736a

4. The St. Gothard Railway Tunnel. Dans: Scientific American, v. 42, n. 12 (20 mars 1880), pp. 176.

   https://doi.org/10.1038/scientificamerican03201880-176

5. Clark, D. K. (1879): The St. Gothard Tunnel. Dans: Minutes of the Proceedings of the Institution of Civil Engineers, v. 57, n. 1879-3 ( 1879), pp. 239-247.

   https://doi.org/10.1680/imotp.1879.22349