U. Abraham, S. Ben-David,
and S. Moran
On the Limitation of the
Global Time Assumption in Distributed
Systems. In S. Toueg, P. G. Spirakis, and L.
M. Kirousis, editors, Distributed Algorithms,
5th International Workshop, volume 579 of
Lecture Notes in Computer Science, pages
1‒8, Delphi, Greece, Oct. 1991. Springer.