U. Schmid, K. Schossmaier:
"Interval-based clock synchronization with optimal precision.";
Information and Computation, 186 (2003), 1; 36 - 77.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04404469Electronic version of the publication:
http://www.auto.tuwien.ac.at/Projects/SynUTC/papers.html