Finally I received an italian translation of the Vygotsky's text I was=20
looking for since almost a year.
The copy was sent me by Phd. L. Mecacci from Univesit=E0 Degli Studi Di=20
Firenze. The translation was made by Cl=E1udia Lasorsa in the book called=
=20
"Studi de psicologia dell'educazione", published in 1986, 5 (3), pp.=20
60-71.
Van Der Veer, Valsiner and Yaroshevsky were right.