The Game Author's Guide to Glulx Inform, for Inform 6.21(G0.35), by Andrew Plotkin, translated into Italian by Marco Falcinelli.
Guida a Inform – Glulx. An Italian guide to using Inform with Glulx, edited by Marco Falcinelli.
"Come scrivere (e giocare) delle avventure testuali in Inform e Glulx" (in English, "How to write (and play) text adventures in Inform and Glulx"). Written in Italian by Vincenzo Scarpa.