It’s a classic. Sadly, I couldn’t find it. I think I first saw it in 2012-13.

Like so

I have a hitch receiver on my sedan. I’ve been tempted to get a set for it because I think it’d be funny.

Edit: I’ve also thought about taking it a step further. My car also has a wiring harness for trailer lights. What if I drill in some red/yellow LED’s into the nuts so they’ll light up when I brake or use the blinker?

Alternatively, you can contact/ask the people who wrote the paper if they can send you a copy. Usually they’ll gladly send it to you for free. I don’t believe they get any of the profit from the journal subscriptions/purchases. So they have no incentive to withhold it from anyone.