Tomás Feder Rajeev Motwani Liadan O'Callaghan Chris Olston Rina Panigrahy Computing shortest paths with uncertainty. 1-18 2007 62 J. Algorithms 1 http://dx.doi.org/10.1016/j.jalgor.2004.07.005 db/journals/jal/jal62.html#FederMOOP07