(en) Paul Murdin, Full Meridian of Glory:
Perilous Adventures in the Competition to Measure the Earth, New York, 2009, geraadpleegd 18 juni 2013 via GoogleBooks
(en) Maurice Crosland, Science Under Control: The French Academy of Sciences 1795-1914, Cambridge, 2002. Geraadpleegd via GoogleBooks, 13 juni 2013.
maritimeprofessional.com
(en) Paris meridian, blog op maritimeprofessional.com, geraadpleegd 5 juni 2013.
port.ac.uk
geog.port.ac.uk
Op de website Universiteit van Portsmouth staat een deel van het decreet, in het Engels: "In order that this first meridian may be more clearly known than it has for some time been, the Admiral of France has consulted persons of knowledge and experience in navigation. The King in consequence forbids all pilots, hydrographers, designers or engravers of maps or terrestrial globes to innovate or vary from the ancient meridian passing through the most westerly of the Canary Islands, without regard to the novel ideas of those who recently fixed it in the Azores on the supposition that there the compass does not vary, for it is certain that this happens also in other places that have never been taken for the meridian." Geraadpleegd 3 februari 2015.
sizes.com
Op deze kaart is het netwerk van berekende driehoeken, met vetgedrukt de basislijn net onder Parijs te zien.Map showing the triangles measured, sizes.com, geraadpleegd 19 juli 2013.
