Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Paris Métro Line 14:

"

As a cost-saving measure, the section from Gare de Lyon to the Bassin de l'Arsenal was excavated at the same time as the tunnels of Line D of the RER Châtelet – Les Halles. The 816,000 m3 (1,067,000 cu yd) of debris excavated is about twice the volume of the Tour Montparnasse, Paris's largest building; and the 19,000 tonnes (18,700 long tons; 20,900 short tons) of steel needed for re-inforced concrete and structural support is twice the mass of the Eiffel Tower.[2]