== article title ("joint winners")? == 

 The title of this article, List of joint winners of the Hugo and Nebula awards, is I believe inaccurate. The phrase "joint winners" suggest two or more literary works that shared a prize. But the article isn't about that at all. A better title might be List of works that won the Hugo Award and the Nebula Award. 

 Compare List of films that won the Golden Globe and the Oscar for Best Picture. Possibly you could insert the word "both" in there after "won".