Item from Mathematical Reviews (American Mathematical Society)--access
their stable url through the AMS database via an institutional library:
MR2184706 (2006g:91131) Kempe, David; Kleinberg, Jon; Tardos,
Éva Influential nodes in a diffusion model for social networks.
Automata, languages and programming, 1127--1138, Lecture Notes in
Comput. Sci., 3580, Springer, Berlin, 2005. (Reviewer: Sandra L.
Arlinghaus) 91D30 (05C90)