Enrico Nardelli Guido Proietti Peter Widmayer Swapping a Failing Edge of a Single Source Shortest Paths Tree Is Good and Fast. 56-74 2003 35 Algorithmica 1 http://link.springer.de/link/service/journals/00453/contents/02/0988/index.html db/journals/algorithmica/algorithmica35.html#NardelliPW03