The author says, "The car would not be shown to the public, though. The 037 that was shown to the press, chassis 005, looked very much like a Lancia, down to its white-with-Martini-stripes livery."
That's not exactly accurate. This car, chassis 001, was shown to the press (and official press photos were released) as the prototype Stradale (road version). Chassis 005 was also shown and is the prototype competition variant.