Lower bounds on the length of universal traversal sequences, JCSS, vol.45, issue.2, p.180203, 1992. ,
Improved length lower bounds for reecting sequences, Computing and Combinatorics, p.5667, 1996. ,
A distributed ant algorithm for eciently patrolling a network, Algorithmica, vol.37, issue.3, p.165186, 2003. ,