also:
Last designs of Luigo Pellarini: pdf file to download - Italian text
Transfield: the first fifty years .pdf file to be downloaded
Jona aircraft website (the swing wing aircraft)
https://rnzaf.proboards.com/thread/12314/pl-11-airtruck has excellent coverage of the New Zealand construcction of the Airtruck.
There are many videos of Luigi's aircraft on the internet. The Airtruck / Airtruk series attract great interest because of their amazing design, and 'flying car' videos are easily found by searching ;Luigi Pellarini aerauto'