Un libro molto interessante di Demostene Floros https://l.facebook.com/l.php?u=https%3A%2F%2Fwww.diarkos.it%2Findex.php%3Fr%3Dcatalog%252Fview%26id%3D206&h=AT3FhqiEyln-yVXWpqr9FEWEu6pYUjSeEO9WesrffcIBhDEYbUnRdcxtkYBERZlAg7mrbIeoEnHtelrvI0wIEDmG84fas_wKuFZ_bMFXT28g9fCQI3eKRY5TY07pa40ut0uzXSDfmQ