An article by Umberta Telfener: « It is the forward of a book that came out only in Italian in 2003, with the direct supervision of my mentor Heinz von Foerster. In Italy it is a book (Sistemica, voices and paths within complexity, Bollati Boringhieri, Torino); it has also been uploaded paragraph by paragraph in the online systemic journal Metalogos. I think it is quite complete as a reflection on the systemic movement and could be of help for teaching. »
