Ying Zhao Wanlei Zhou Yingying Zhang E. J. Lanham Jiumei Huang Clock Synchronization State Graphs Based on Clock Precision Difference. 34-39 2005 conf/ica3pp/2005 ICA3PP http://dx.doi.org/10.1007/11564621_4 db/conf/ica3pp/ica3pp2005.html#ZhaoZZLH05