yes it's been talked about many times, no link for ya but I can tell what I usually carry with me.
In my tool kit is a 10mm combo wrench, 10mm and 8mm sockets with a socket wrench, pliers, screw drivers, crescent wrench and a multi tool for bikes. I also carry a spare tube or two, tire tools and a pump.
With that in my tool kit I've not run into a problem on the road that I could not fix.