Raphael Yuster All-pairs disjoint paths from a common ancestor in O~(n<sup>infinit</sup>) time. 145-150 2008 396 Theor. Comput. Sci. 1-3 http://dx.doi.org/10.1016/j.tcs.2008.01.032 db/journals/tcs/tcs396.html#Yuster08