This isn't the offical article that you were looking for, but I know firsthand of a similar story of proper tourniquet usage. A Scout in my troop back home in WV went bike riding with a friend. His friend got out of control down a hill and slid into a guy wire for a telephone pole. The impact with the wire nearly severed the kid's leg mid shin. The Scout ran to a nearby house, told them to call 911 and then aquired a towel and wooden cooking spoon, with which he made a tourniquet upon returning to the kid. The paramedics said that he is the only reason his friend is alive.

Normally, your average, untrained person shouldn't use tourniquets, as limb loss is a near certainty. But in this case, with the limb already severed and hanging only by a tendon to two, a tourniquet was the best method to stop the blood loss. Pressure points, direct compression, and elevation can take care of all but the worst cases of severe bleeding.

I know the link to the above story if you want it, but it's in my local paper's archives that costs like $2 to download. Hope this might help.