J. Mendling, H. Leopold, and F. Pittke. International Journal of Information Systems and Software Engineering for Big Companies (IJISEBC), 1 (1):
78--94(2015)
P. Sica. volume 2 of Grandi opere, chapter 9, page 826-888. editori Laterza, via di Villa Sacchetti 17 00197 Roma, second edition, (December 1985)C'est un livre très utile pour comprendre la ville du 19ème siècle.