http://www.cpt.univ-mrs.fr/~rovelli/carlo3.JPG
http://www.phyast.pitt.edu/Resources...1996/carlo.jpg
http://www.abreuvetascience.org/blog...elli_13025.jpg
http://relativity.livingreviews.org/...rs/rovelli.jpg
http://www.fita-mongolfiere.org/Documenti/marco_1.JPG
