– FRIENDS OF THE EARTH SWEDEN http://www.jordensvanner.se/trafik/save-the-european-night-trains
– Greenpeace UK : http://greenpeace.org.uk/blog/climate/night-train-cuts-de-rail-green-travel-20141205
– Friends of the earth europe : http://www.foeeurope.org/save-night-train-sign-now-271014